crypto: ccp: Make snp_range_list static

Fix:

  drivers/crypto/ccp/sev-dev.c:93:28: sparse: sparse: symbol 'snp_range_list' was not declared. Should it be static?
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202402031410.GTE3PJ1Y-lkp@intel.comSigned-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/202402031410.GTE3PJ1Y-lkp@intel.com

drivers/crypto/ccp/sev-dev.c

@@ -107,7 +107,7 @@ static void *sev_init_ex_buffer;
  *   Array containing range of pages that firmware transitions to HV-fixed
  *   page state.
  */
-struct sev_data_range_list *snp_range_list;
+static struct sev_data_range_list *snp_range_list;
 
 static inline bool sev_version_greater_or_equal(u8 maj, u8 min)
 {