microblaze: Setup dependencies for ASM optimized lib functions

commit 18ffc0cce4ff947a2acc9b2e06ae5309a6e6fb43 upstream.

The patch:
"microblaze: Setup proper dependency for optimized lib functions"
(sha1: 7b6ce52be3f86520524711a6f33f3866f9339694)
didn't setup all dependencies properly.
Optimized lib functions in C are also present for little endian
and optimized library functions in assembler are implemented only for
big endian version.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/microblaze/Kconfig.platform b/arch/microblaze/Kconfig.platform
index 1b3d8c8..f7f1739 100644
--- a/arch/microblaze/Kconfig.platform
+++ b/arch/microblaze/Kconfig.platform
@@ -20,6 +20,7 @@
 config OPT_LIB_ASM
 	bool "Optimalized lib function ASM"
 	depends on OPT_LIB_FUNCTION && (XILINX_MICROBLAZE0_USE_BARREL = 1)
+	depends on CPU_BIG_ENDIAN
 	default n
 	help
 	  Allows turn on optimalized library function (memcpy and memmove).