arm: Update a stale comment in bootblock .S files

This just updates a comment which refers to "board_init_f". We use
bootblock main() in coreboot.

BUG=none
BRANCH=none
TEST=locally compiled.

Change-Id: I4cb6b3c11f163b67fe48de495d13dce88710efc0
Reviewed-on: https://chromium-review.googlesource.com/172095
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
diff --git a/src/arch/arm/armv4/bootblock.S b/src/arch/arm/armv4/bootblock.S
index 5f7de13..3ba2a88 100644
--- a/src/arch/arm/armv4/bootblock.S
+++ b/src/arch/arm/armv4/bootblock.S
@@ -65,7 +65,7 @@
 	cmp	r0, r1
 	bne	init_stack_loop
 
-/* Set stackpointer in internal RAM to call board_init_f */
+/* Set stackpointer in internal RAM to call bootblock main() */
 call_bootblock:
 	ldr	sp, .Stack /* Set up stack pointer */
 	ldr	r0,=0x00000000
diff --git a/src/arch/arm/armv7/bootblock.S b/src/arch/arm/armv7/bootblock.S
index f2f528a..f18a355 100644
--- a/src/arch/arm/armv7/bootblock.S
+++ b/src/arch/arm/armv7/bootblock.S
@@ -76,7 +76,7 @@
 	cmp	r0, r1
 	bne	init_stack_loop
 
-/* Set stackpointer in internal RAM to call board_init_f */
+/* Set stackpointer in internal RAM to call bootblock main() */
 call_bootblock:
 	ldr	sp, .Stack /* Set up stack pointer */
 	ldr	r0,=0x00000000
diff --git a/src/soc/nvidia/tegra124/bootblock_asm.S b/src/soc/nvidia/tegra124/bootblock_asm.S
index 5f7de13..3ba2a88 100644
--- a/src/soc/nvidia/tegra124/bootblock_asm.S
+++ b/src/soc/nvidia/tegra124/bootblock_asm.S
@@ -65,7 +65,7 @@
 	cmp	r0, r1
 	bne	init_stack_loop
 
-/* Set stackpointer in internal RAM to call board_init_f */
+/* Set stackpointer in internal RAM to call bootblock main() */
 call_bootblock:
 	ldr	sp, .Stack /* Set up stack pointer */
 	ldr	r0,=0x00000000