arm: spear: Do not link the _main branch

The _main call is not supposed to return at all: don't link the
branch.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/cpu/arm926ejs/spear/start.S b/arch/arm/cpu/arm926ejs/spear/start.S
index 2cf854e..9ac9629 100644
--- a/arch/arm/cpu/arm926ejs/spear/start.S
+++ b/arch/arm/cpu/arm926ejs/spear/start.S
@@ -57,8 +57,9 @@
 
 	/*
 	 * Go setup Memory and board specific bits prior to relocation.
+	 * This call is not supposed to return.
 	 */
-	bl	_main	/* _main will call board_init_f */
+	b	_main	/* _main will call board_init_f */
 
 back_to_bootrom:
 	pop	{r0-r12,pc}