misc: vop: build VOP based on CONFIG_VOP

Build module or builtin VOP based on CONFIG_VOP macro.
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Link: https://lore.kernel.org/r/20200929091106.24624-3-sherry.sun@nxp.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mic/vop/Makefile

@@ -3,7 +3,7 @@
 # Makefile - Intel MIC Linux driver.
 # Copyright(c) 2016, Intel Corporation.
 #
-obj-m := vop.o
+obj-$(CONFIG_VOP) := vop.o
 
 vop-objs += vop_main.o
 vop-objs += vop_debugfs.o