[devices]: Support 32x50G+16x40G profile on Seastone-DX010 (#2474)

The sai profile itself can support 32x50G+16x100G/40G while
the initial port_config.ini uses 40G speeds for port 17-32.

Signed-off-by: Zhenggen Xu <zxu@linkedin.com>

Author: zhenggen-xu

device/celestica/x86_64-cel_seastone-r0/Seastone-DX010-50-40/port_config.ini

@@ -0,0 +1,49 @@
+# name          lanes           alias       index       speed
+Ethernet0       65,66           Eth1/1      0           50000
+Ethernet2       67,68           Eth1/2      0           50000
+Ethernet4       69,70           Eth2/1      1           50000
+Ethernet6       71,72           Eth2/2      1           50000
+Ethernet8       73,74           Eth3/1      2           50000
+Ethernet10      75,76           Eth3/2      2           50000
+Ethernet12      77,78           Eth4/1      3           50000
+Ethernet14      79,80           Eth4/2      3           50000
+Ethernet16      33,34           Eth5/1      4           50000
+Ethernet18      35,36           Eth5/2      4           50000
+Ethernet20      37,38           Eth6/1      5           50000
+Ethernet22      39,40           Eth6/2      5           50000
+Ethernet24      41,42           Eth7/1      6           50000
+Ethernet26      43,44           Eth7/2      6           50000
+Ethernet28      45,46           Eth8/1      7           50000
+Ethernet30      47,48           Eth8/2      7           50000
+Ethernet32      49,50           Eth9/1      8           50000
+Ethernet34      51,52           Eth9/2      8           50000
+Ethernet36      53,54           Eth10/1     9           50000
+Ethernet38      55,56           Eth10/2     9           50000
+Ethernet40      57,58           Eth11/1     10          50000
+Ethernet42      59,60           Eth11/2     10          50000
+Ethernet44      61,62           Eth12/1     11          50000
+Ethernet46      63,64           Eth12/2     11          50000
+Ethernet48      81,82           Eth13/1     12          50000
+Ethernet50      83,84           Eth13/2     12          50000
+Ethernet52      85,86           Eth14/1     13          50000
+Ethernet54      87,88           Eth14/2     13          50000
+Ethernet56      89,90           Eth15/1     14          50000
+Ethernet58      91,92           Eth15/2     14          50000
+Ethernet60      93,94           Eth16/1     15          50000
+Ethernet62      95,96           Eth16/2     15          50000
+Ethernet64      97,98,99,100    Eth17       16          40000
+Ethernet68      101,102,103,104 Eth18       17          40000
+Ethernet72      105,106,107,108 Eth19       18          40000
+Ethernet76      109,110,111,112 Eth20       19          40000
+Ethernet80      1,2,3,4         Eth21       20          40000
+Ethernet84      5,6,7,8         Eth22       21          40000
+Ethernet88      9,10,11,12      Eth23       22          40000
+Ethernet92      13,14,15,16     Eth24       23          40000
+Ethernet96      17,18,19,20     Eth25       24          40000
+Ethernet100     21,22,23,24     Eth26       25          40000
+Ethernet104     25,26,27,28     Eth27       26          40000
+Ethernet108     29,30,31,32     Eth28       27          40000
+Ethernet112     113,114,115,116 Eth29       28          40000
+Ethernet116     117,118,119,120 Eth30       29          40000
+Ethernet120     121,122,123,124 Eth31       30          40000
+Ethernet124     125,126,127,128 Eth32       31          40000

device/celestica/x86_64-cel_seastone-r0/Seastone-DX010-50-40/sai.profile

@@ -0,0 +1 @@
+SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/th-seastone-dx010-32x50G-16x100G.config.bcm