arm: ep9315: Add .vectors section to lds and remove obsolete lds

However ep9315 don't use
interrupt vectors during startup, but _startup symbol is used inside uboot to
calculate actual monitor size.

Signed-off-by: Sergey Kostanbaev <sergey.kostanbaev@gmail.com>
Cc: albert.u.boot@aribaud.net

board/cirrus/edb93xx/u-boot.lds

@@ -21,6 +21,7 @@ SECTIONS
 	. = ALIGN(4);
 	.text : {
 		*(.__image_copy_start)
+		*(.vectors)
 		arch/arm/cpu/arm920t/start.o (.text*)
 		. = 0x1000;