ppc4xx: Change Canyonlands to support booting from 2k page NAND devices

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/amcc/canyonlands/init.S b/board/amcc/canyonlands/init.S
index bd4cab5..258fb5d 100644
--- a/board/amcc/canyonlands/init.S
+++ b/board/amcc/canyonlands/init.S
@@ -51,6 +51,7 @@
 #else
 	tlbentry(CFG_NAND_BOOT_SPL_SRC, SZ_4K, CFG_NAND_BOOT_SPL_SRC, 4, AC_R|AC_W|AC_X|SA_G)
 	tlbentry(CFG_SDRAM_BASE, SZ_256M, CFG_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G|SA_I)
+	tlbentry(256 << 20, SZ_256M, 256 << 20, 0, AC_R|AC_W|AC_X|SA_G|SA_I)
 #endif
 
 	/*