arm: move exception handling out of start.S files

Exception handling is basically identical for all ARM targets.
Factorize it out of the various start.S files and into a
single vectors.S file, and adjust linker scripts accordingly.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
diff --git a/arch/arm/cpu/armv7/socfpga/lowlevel_init.S b/arch/arm/cpu/armv7/socfpga/lowlevel_init.S
index 1caaa27..2f2e9fc 100644
--- a/arch/arm/cpu/armv7/socfpga/lowlevel_init.S
+++ b/arch/arm/cpu/armv7/socfpga/lowlevel_init.S
@@ -10,20 +10,7 @@
 /* Save the parameter pass in by previous boot loader */
 .global save_boot_params
 save_boot_params:
-	/* save the parameter here */
-
-	/*
-	 * Setup stack for exception, which is located
-	 * at the end of on-chip RAM. We don't expect exception prior to
-	 * relocation and if that happens, we won't worry -- it will overide
-	 * global data region as the code will goto reset. After relocation,
-	 * this region won't be used by other part of program.
-	 * Hence it is safe.
-	 */
-	ldr	r0, =(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE)
-	ldr	r1, =IRQ_STACK_START_IN
-	str	r0, [r1]
-
+	/* no parameter to save */
 	bx	lr