eclic: move eclic-mode-hack.S into Rust

Uses inline assembly to move the code from `eclic-mode-hack.S` into
Rust.

The generated assembly is different. This commit should be reverted if
regressions are noticed on real hardware.

device.x

@@ -0,0 +1,64 @@
+PROVIDE(INT_SFT = DefaultHandler);
+PROVIDE(INT_TMR = DefaultHandler);
+PROVIDE(INT_BWEI = DefaultHandler);
+PROVIDE(INT_PMOVI = DefaultHandler);
+PROVIDE(WWDGT = DefaultHandler);
+PROVIDE(EXTI_LVD = DefaultHandler);
+PROVIDE(TAMPER = DefaultHandler);
+PROVIDE(RTC = DefaultHandler);
+PROVIDE(FMC = DefaultHandler);
+PROVIDE(RCU = DefaultHandler);
+PROVIDE(EXTI_LINE0 = DefaultHandler);
+PROVIDE(EXTI_LINE1 = DefaultHandler);
+PROVIDE(EXTI_LINE2 = DefaultHandler);
+PROVIDE(EXTI_LINE3 = DefaultHandler);
+PROVIDE(EXTI_LINE4 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL0 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL1 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL2 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL3 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL4 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL5 = DefaultHandler);
+PROVIDE(DMA0_CHANNEL6 = DefaultHandler);
+PROVIDE(ADC0_1 = DefaultHandler);
+PROVIDE(CAN0_TX = DefaultHandler);
+PROVIDE(CAN0_RX0 = DefaultHandler);
+PROVIDE(CAN0_RX1 = DefaultHandler);
+PROVIDE(CAN0_EWMC = DefaultHandler);
+PROVIDE(EXTI_LINE9_5 = DefaultHandler);
+PROVIDE(TIMER0_BRK = DefaultHandler);
+PROVIDE(TIMER0_UP = DefaultHandler);
+PROVIDE(TIMER0_TRG_CMT = DefaultHandler);
+PROVIDE(TIMER0_CHANNEL = DefaultHandler);
+PROVIDE(TIMER1 = DefaultHandler);
+PROVIDE(TIMER2 = DefaultHandler);
+PROVIDE(TIMER3 = DefaultHandler);
+PROVIDE(I2C0_EV = DefaultHandler);
+PROVIDE(I2C0_ER = DefaultHandler);
+PROVIDE(I2C1_EV = DefaultHandler);
+PROVIDE(I2C1_ER = DefaultHandler);
+PROVIDE(SPI0 = DefaultHandler);
+PROVIDE(SPI1 = DefaultHandler);
+PROVIDE(USART0 = DefaultHandler);
+PROVIDE(USART1 = DefaultHandler);
+PROVIDE(USART2 = DefaultHandler);
+PROVIDE(EXTI_LINE15_10 = DefaultHandler);
+PROVIDE(RTC_ALARM = DefaultHandler);
+PROVIDE(USBFS_WKUP = DefaultHandler);
+PROVIDE(TIMER4 = DefaultHandler);
+PROVIDE(SPI2 = DefaultHandler);
+PROVIDE(UART3 = DefaultHandler);
+PROVIDE(UART4 = DefaultHandler);
+PROVIDE(TIMER5 = DefaultHandler);
+PROVIDE(TIMER6 = DefaultHandler);
+PROVIDE(DMA1_CHANNEL0 = DefaultHandler);
+PROVIDE(DMA1_CHANNEL1 = DefaultHandler);
+PROVIDE(DMA1_CHANNEL2 = DefaultHandler);
+PROVIDE(DMA1_CHANNEL3 = DefaultHandler);
+PROVIDE(DMA1_CHANNEL4 = DefaultHandler);
+PROVIDE(CAN1_TX = DefaultHandler);
+PROVIDE(CAN1_RX0 = DefaultHandler);
+PROVIDE(CAN1_RX1 = DefaultHandler);
+PROVIDE(CAN1_EWMC = DefaultHandler);
+PROVIDE(USBFS = DefaultHandler);
+