Marvell-armhf: Reduce kernel image size for u-boot

Marvell-armhf platforms using u-boot has constraints when loading the
kernel image into the physical memory region reserved for the kernel
and ramdisk image. This commit reduces the size of the kernel image to
meet those constraints.

- Disable unused architectures to reduce the size of the kernel
- Disable sound device driver module

Testing:
 - Check kernel boots without any memory overlapping errors
 - kernel binary size before this commit : 6197760 bytes
 - kernel binary size after this commit  : 5192480 bytes

patch/kconfig-exclusions

@@ -16,3 +16,25 @@ CONFIG_NO_HZ_IDLE
 CONFIG_HZ_250
 CONFIG_SLUB
 CONFIG_DEBUG_SLAB
+CONFIG_ARCH_VIRT
+CONFIG_ARCH_BCM
+CONFIG_ARCH_EXYNOS
+CONFIG_ARCH_HIGHBANK
+CONFIG_ARCH_MXC
+CONFIG_ARCH_MESON
+CONFIG_ARCH_OMAP3
+CONFIG_ARCH_OMAP4
+CONFIG_SOC_OMAP5
+CONFIG_SOC_AM33XX
+CONFIG_SOC_DRA7XX
+CONFIG_ARCH_ROCKCHIP
+CONFIG_ARCH_SOCFPGA
+CONFIG_ARCH_SUNXI
+CONFIG_ARCH_TEGRA
+CONFIG_ARCH_VEXPRESS
+CONFIG_ARCH_WM8850
+CONFIG_FW_CFG_SYSFS
+CONFIG_VORTEX
+CONFIG_NTP_PPS
+CONFIG_SENSORS_MAX6620
+CONFIG_SND_LX6464ES