Update layerscape platform to not rely on undefined overflow behaviour

This consists of ensuring that the left operand of each shift is
unsigned when the operation might overflow into the sign bit.

Change-Id: Ib63ef6e2e4616dd56828bfd3800d5fe2df109934
Signed-off-by: Justin Chadwell <justin.chadwell@arm.com>

plat/layerscape/board/ls1043/ls1043_psci.c

@@ -66,12 +66,12 @@ static void ls1043_reset_core(int core_pos)
 	dsb();
 	/* enable core soft reset */
 	mmio_write_32(LS_SCFG_BASE + LS_SCFG_CORESRENCR_OFFSET,
-		      htobe32(1 << 31));
+		      htobe32(1U << 31));
 	dsb();
 	isb();
 	/* reset core */
 	mmio_write_32(LS_SCFG_BASE + LS_SCFG_CORE0_SFT_RST_OFFSET +
-			core_pos * 4, htobe32(1 << 31));
+			core_pos * 4, htobe32(1U << 31));
 	mdelay(10);
 }
 

plat/layerscape/board/ls1043/ls_gic.c

@@ -35,7 +35,7 @@ void get_gic_offset(uint32_t *gicc_base, uint32_t *gicd_base)
 			soc_dev_id == (SVR_LS1043AE << 8)) &&
 			((val & 0xff) == REV1_1)) {
 		val = be32toh(mmio_read_32((uintptr_t)gic_align));
-		if (val & (1 << GIC_ADDR_BIT)) {
+		if (val & (1U << GIC_ADDR_BIT)) {
 			*gicc_base = GICC_BASE;
 			*gicd_base = GICD_BASE;
 		} else {

plat/layerscape/common/include/soc.h

@@ -9,9 +9,9 @@
 
 #include <stdint.h>
 
-#define SVR_WO_E		0xFFFFFE
-#define SVR_LS1043A		0x879204
-#define SVR_LS1043AE		0x879200
+#define SVR_WO_E		0xFFFFFEu
+#define SVR_LS1043A		0x879204u
+#define SVR_LS1043AE		0x879200u
 
 void get_gic_offset(uint32_t *gicc_base, uint32_t *gicd_base);