EDAC, mce_amd_inj: Make inj_type static

It is used there only anyway.

Signed-off-by: Fengguang Wu <[e-mail]>
Cc: Aravind Gopalakrishnan <[e-mail]>
Cc: Mauro Carvalho Chehab <[e-mail]>
Cc: [e-mail]
Cc: linux-edac <[e-mail]>
Link: http://lkml.kernel.org/r/20150605112426.GA97073@lkp-sb04
Signed-off-by: Borislav Petkov <[e-mail]>

drivers/edac/mce_amd_inj.c

···
 };
 
 /* Set default injection to SW_INJ */
-enum injection_type inj_type = SW_INJ;
+static enum injection_type inj_type = SW_INJ;
 
 #define MCE_INJECT_SET(reg)						\
 static int inj_##reg##_set(void *data, u64 val)				\