microblaze: Setup dependencies for ASM optimized lib functions

The patch:
"microblaze: Setup proper dependency for optimized lib functions"
(sha1: 7b6ce52b)
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>

arch/microblaze/Kconfig.platform

@@ -8,7 +8,6 @@ menu "Platform options"
 
 config OPT_LIB_FUNCTION
 	bool "Optimalized lib function"
-	depends on CPU_LITTLE_ENDIAN
 	default y
 	help
 	  Allows turn on optimalized library function (memcpy and memmove).
@@ -21,6 +20,7 @@ config OPT_LIB_FUNCTION
 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).

arch/microblaze/lib/fastcopy.S

@@ -29,10 +29,6 @@
  *	between mem locations with size of xfer spec'd in bytes
  */
 
-#ifdef __MICROBLAZEEL__
-#error Microblaze LE not support ASM optimized lib func. Disable OPT_LIB_ASM.
-#endif
-
 #include <linux/linkage.h>
 	.text
 	.globl	memcpy