Blackfin: handle reboot anomaly 432

Workaround anomaly 432:
The bfrom_SysControl() firmware function does not clear the SIC_IWR1
register before executing the PLL programming sequence.  Therefore, any
interrupt enabled in the SIC_IWR1 register prior to the call to
bfrom_SysControl() can prematurely terminate the idle sequence required
for the PLL to relock properly. SIC_IWR0 is properly handled.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

cpu/blackfin/initcode.c

@@ -273,8 +273,14 @@ void initcode(ADI_BOOT_DATA *bootstruct)
 		memory_settings.uwPllCtl = CONFIG_PLL_CTL_VAL;
 		memory_settings.uwPllDiv = CONFIG_PLL_DIV_VAL;
 		memory_settings.uwPllLockCnt = CONFIG_PLL_LOCKCNT_VAL;
+#if ANOMALY_05000432
+		bfin_write_SIC_IWR1(0);
+#endif
 		syscontrol(SYSCTRL_WRITE | SYSCTRL_VRCTL | SYSCTRL_PLLCTL | SYSCTRL_PLLDIV | SYSCTRL_LOCKCNT |
 			(CONFIG_VR_CTL_VAL & FREQ_MASK ? SYSCTRL_INTVOLTAGE : SYSCTRL_EXTVOLTAGE), &memory_settings, NULL);
+#if ANOMALY_05000432
+		bfin_write_SIC_IWR1(-1);
+#endif
 	} else {
 		serial_putc('L');