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/board/xilinx/microblaze-generic/Kconfig b/board/xilinx/microblaze-generic/Kconfig
index c8b11ca..02ac65c 100644
--- a/board/xilinx/microblaze-generic/Kconfig
+++ b/board/xilinx/microblaze-generic/Kconfig
@@ -9,6 +9,10 @@
 config SYS_CONFIG_NAME
 	default "microblaze-generic"
 
+config XILINX_MICROBLAZE0_USE_MSR_INSTR
+	int "USE_MSR_INSTR range (0:1)"
+	default 0
+
 config XILINX_MICROBLAZE0_USE_PCMP_INSTR
 	int "USE_PCMP_INSTR range (0:1)"
 	default 0