arm: spear: Fix booting - relocate vector table to 0 (low-vector)

Booting SPEAr600 eval board doesn't work with current mainline U-Boot. With
this patch the low-vector bit is left to '0'. Resulting in the common
relocation of the vectors to 0 (SDRAM) to work correctly.

Tested on the SPEAr600 EVB.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Vipin Kumar <vk.vipin@gmail.com>

board/spear/common/spr_lowlevel_init.S

@@ -14,11 +14,6 @@
  */
 .globl lowlevel_init
 lowlevel_init:
-	/* By default, U-Boot switches CPU to low-vector */
-	/* Revert this as we work in high vector even in U-Boot */
-	mrc	p15, 0, r0, c1, c0, 0
-	orr	r0, r0, #0x00002000
-	mcr	p15, 0, r0, c1, c0, 0
 	mov	pc, lr
 
 /* void setfreq(unsigned int device, unsigned int frequency) */