crypto: hisilicon/sec2 - constify sec_dfx_regs

sec_dfx_regs is never changed and can therefore be made const.

This allows the compiler to put it in the text section instead of the
data section.

Before:
   text    data     bss     dec     hex filename
  17982    7312     480   25774    64ae drivers/crypto/hisilicon/sec2/sec_main.o

After:
   text    data     bss     dec     hex filename
  18366    6928     480   25774    64ae drivers/crypto/hisilicon/sec2/sec_main.o

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/hisilicon/sec2/sec_main.c

@@ -110,7 +110,7 @@ static const char * const sec_dbg_file_name[] = {
 	[SEC_CLEAR_ENABLE] = "clear_enable",
 };
 
-static struct debugfs_reg32 sec_dfx_regs[] = {
+static const struct debugfs_reg32 sec_dfx_regs[] = {
 	{"SEC_PF_ABNORMAL_INT_SOURCE    ",  0x301010},
 	{"SEC_SAA_EN                    ",  0x301270},
 	{"SEC_BD_LATENCY_MIN            ",  0x301600},