SCTLR and ACTLR are 32-bit for AArch32 and 64-bit for AArch64

AArch64 System register SCTLR_EL1[31:0] is architecturally mapped
to AArch32 System register SCTLR[31:0]
AArch64 System register ACTLR_EL1[31:0] is architecturally mapped
to AArch32 System register ACTLR[31:0].

`u_register_t` should be used when it's important to store the
contents of a register in its native size
Signed-off-by: Deepika Bhavnani <deepika.bhavnani@arm.com>
Change-Id: I0055422f8cc0454405e011f53c1c4ddcaceb5779

lib/el3_runtime/aarch64/context_mgmt.c

@@ -69,7 +69,7 @@ void cm_setup_context(cpu_context_t *ctx, const entry_point_info_t *ep)
 	uint32_t scr_el3;
 	el3_state_t *state;
 	gp_regs_t *gp_regs;
-	unsigned long sctlr_elx, actlr_elx;
+	u_register_t sctlr_elx, actlr_elx;
 
 	assert(ctx != NULL);