src/arch: Improve code formatting

Change-Id: Ic1ca6c2e1cd06800d7eb2d00ac0b328987d022ef
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/16434
Tested-by: build bot (Jenkins)
Reviewed-by: Omar Pakker

src/arch/arm64/transition_asm.S

@@ -124,8 +124,8 @@ ENDPROC(exc_prologue)
  * x0 = regs structure
  */
 ENTRY(trans_switch)
-	msr	 SPSel, #SPSR_USE_L
-        b        exc_exit
+	msr	SPSel, #SPSR_USE_L
+	b	exc_exit
 ENDPROC(trans_switch)
 
 /*