hack to make U-Boot's SPL return to FEL on A523 (by re-enabling GICv3 interrupts before returning to BROM)

spl_a523_felret.patch

diff --git a/arch/arm/cpu/armv8/fel_utils.S b/arch/arm/cpu/armv8/fel_utils.S
index cee030e4809..42a7c93b97a 100644
--- a/arch/arm/cpu/armv8/fel_utils.S
+++ b/arch/arm/cpu/armv8/fel_utils.S
@@ -65,7 +65,7 @@ ENTRY(return_to_fel)
 
 /* AArch32 code to restore the state from fel_stash and return back to FEL. */
 back_in_32:
-	.word	0xe59f0028	// ldr	r0, [pc, #40]	; load fel_stash address
+	.word	0xe59f0038	// ldr	r0, [pc, #56]	; load fel_stash address
 	.word	0xe5901008	// ldr	r1, [r0, #8]
 	.word	0xe129f001	// msr	CPSR_fc, r1
 	.word	0xf57ff06f	// isb
@@ -76,6 +76,11 @@ back_in_32:
 	.word	0xe590100c	// ldr	r1, [r0, #12]
 	.word	0xee011f10	// mcr	15, 0, r1, cr1, cr0, {0}  ; SCTLR
 	.word	0xf57ff06f	// isb
+	.word	0xe3a000f0	// mov  r0, #0xf0
+	.word	0xee040f16	// mcr  15, 0, r0, cr4, cr6, {0}  ; ICC_PMR
+	.word	0xe3a00001	// mov  r0, #1
+	.word	0xee0c0ffc	// mcr  15, 0, r0, cr12, cr12, {7}; ICC_IGRPEN1
+
 	.word	0xe12fff1e	// bx	lr		; return to FEL
 fel_stash_addr:
 	.word   0x00000000	// receives fel_stash addr, by AA64 code above