microblaze: Move MSR instruction selection to Kconfig

Select MSR instructions via Kconfig instead of xparameters.h.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/microblaze/include/asm/asm.h b/arch/microblaze/include/asm/asm.h
index 11f3dd0..94f0562 100644
--- a/arch/microblaze/include/asm/asm.h
+++ b/arch/microblaze/include/asm/asm.h
@@ -50,7 +50,7 @@
 #define NOP	__asm__ __volatile__ ("nop");
 
 /* use machine status registe USE_MSR_REG */
-#if XILINX_USE_MSR_INSTR == 1
+#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR == 1
 #define MSRSET(val) \
 	__asm__ __volatile__ ("msrset r0," #val );