Unify start_el3 & start_no_el3

Now that the start_el3 and start_no_el3 labels point at the same place,
unify them into a start_bootmethod label and update callers.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/arch/aarch32/boot.S b/arch/aarch32/boot.S
index 820957b..4d16c9c 100644
--- a/arch/aarch32/boot.S
+++ b/arch/aarch32/boot.S
@@ -51,7 +51,7 @@
 
 	bl	cpu_init_bootwrapper
 
-	b	start_no_el3
+	b	start_bootmethod
 
 _switch_monitor:
 	adr	lr, _monitor
@@ -69,8 +69,7 @@
 
 	bl	gic_secure_init
 
-	/* Initialise boot method */
-	b	start_el3
+	b	start_bootmethod
 
 err_invalid_id:
 	b	.
diff --git a/arch/aarch32/psci.S b/arch/aarch32/psci.S
index cdc36b0..6613b6f 100644
--- a/arch/aarch32/psci.S
+++ b/arch/aarch32/psci.S
@@ -38,6 +38,5 @@
 	pop	{r4 - r12, lr}
 	movs	pc, lr
 
-ASM_FUNC(start_el3)
-ASM_FUNC(start_no_el3)
+ASM_FUNC(start_bootmethod)
 	b	psci_first_spin
diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
index c0ec518..da5fa65 100644
--- a/arch/aarch64/boot.S
+++ b/arch/aarch64/boot.S
@@ -57,7 +57,7 @@
 
 	bl	gic_secure_init
 
-	b	start_el3
+	b	start_bootmethod
 
 	/*
 	 * EL2 initialization
@@ -97,7 +97,7 @@
 
 	bl	cpu_init_bootwrapper
 
-	b	start_no_el3
+	b	start_bootmethod
 
 err_invalid_id:
 	b	.
diff --git a/arch/aarch64/psci.S b/arch/aarch64/psci.S
index d6ca2eb..9709dbb 100644
--- a/arch/aarch64/psci.S
+++ b/arch/aarch64/psci.S
@@ -79,6 +79,5 @@
 	ldp	x18, x19, [sp], #16
 	eret
 
-ASM_FUNC(start_el3)
-ASM_FUNC(start_no_el3)
+ASM_FUNC(start_bootmethod)
 	b	psci_first_spin
diff --git a/arch/aarch64/spin.S b/arch/aarch64/spin.S
index 764c532..375f732 100644
--- a/arch/aarch64/spin.S
+++ b/arch/aarch64/spin.S
@@ -15,8 +15,7 @@
 ASM_FUNC(cpu_init_bootmethod)
 	ret
 
-ASM_FUNC(start_el3)
-ASM_FUNC(start_no_el3)
+ASM_FUNC(start_bootmethod)
 	cpuid	x0, x1
 	bl	find_logical_id