sample/tsm-mr: Fix missing static for sample_report

0day robot reports 'sample_report' can be static, fix it up.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202505090938.avfIhLsl-lkp@intel.com/
Signed-off-by: Cedric Xing <cedric.xing@intel.com>
Link: https://patch.msgid.link/20250509030350.22363-1-cedric.xing@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Author: binxing

samples/tsm-mr/tsm_mr_sample.c

@@ -8,7 +8,7 @@
 #include <linux/miscdevice.h>
 #include <crypto/hash.h>
 
-struct {
+static struct {
 	u8 static_mr[SHA384_DIGEST_SIZE];
 	u8 config_mr[SHA512_DIGEST_SIZE];
 	u8 rtmr0[SHA256_DIGEST_SIZE];