board: ti: ks2_evm: Over ride spl_get_load_buffer function

Currently k2 spi boot is broken as the image header
is getting copied to an invalid memory location

CONFIG_SYS_TEXT_BASE - sizeof (struct image_size)
which maps to 0xc000000 - 0x40 = 0xbffffc0 being a reserved
location.

We cannot change the CONFIG_SYS_TEXT_BASE address as the single
stage boots like UART boot will need the address to be 0xc000000
hence override the spl_get_load_buffer to have image_header
address as CONFIG_SYS_TEXT_BASE aka 0xc000000

Signed-off-by: Keerthy <j-keerthy@ti.com>
diff --git a/board/ti/ks2_evm/board.c b/board/ti/ks2_evm/board.c
index 72709c0..3e06800 100644
--- a/board/ti/ks2_evm/board.c
+++ b/board/ti/ks2_evm/board.c
@@ -59,6 +59,11 @@
 	return 0;
 }
 
+struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
+{
+	return (struct image_header *)(CONFIG_SYS_TEXT_BASE);
+}
+
 int board_init(void)
 {
 	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;