crypto: qat - Make several functions static

Functions qat_rsa_set_n, qat_rsa_set_e and qat_rsa_set_n are local to
the source and do not need to be in global scope, so make them static.

Cleans up sparse warnings:
drivers/crypto/qat/qat_common/qat_asym_algs.c:972:5: warning: symbol
'qat_rsa_set_n' was not declared. Should it be static?
drivers/crypto/qat/qat_common/qat_asym_algs.c:1003:5: warning: symbol
'qat_rsa_set_e' was not declared. Should it be static?
drivers/crypto/qat/qat_common/qat_asym_algs.c:1027:5: warning: symbol
'qat_rsa_set_d' was not declared. Should it be static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qat/qat_common/qat_asym_algs.c

@@ -969,7 +969,8 @@ unmap_src:
 	return ret;
 }
 
-int qat_rsa_set_n(struct qat_rsa_ctx *ctx, const char *value, size_t vlen)
+static int qat_rsa_set_n(struct qat_rsa_ctx *ctx, const char *value,
+			 size_t vlen)
 {
 	struct qat_crypto_instance *inst = ctx->inst;
 	struct device *dev = &GET_DEV(inst->accel_dev);
@@ -1000,7 +1001,8 @@ err:
 	return ret;
 }
 
-int qat_rsa_set_e(struct qat_rsa_ctx *ctx, const char *value, size_t vlen)
+static int qat_rsa_set_e(struct qat_rsa_ctx *ctx, const char *value,
+			 size_t vlen)
 {
 	struct qat_crypto_instance *inst = ctx->inst;
 	struct device *dev = &GET_DEV(inst->accel_dev);
@@ -1024,7 +1026,8 @@ int qat_rsa_set_e(struct qat_rsa_ctx *ctx, const char *value, size_t vlen)
 	return 0;
 }
 
-int qat_rsa_set_d(struct qat_rsa_ctx *ctx, const char *value, size_t vlen)
+static int qat_rsa_set_d(struct qat_rsa_ctx *ctx, const char *value,
+			 size_t vlen)
 {
 	struct qat_crypto_instance *inst = ctx->inst;
 	struct device *dev = &GET_DEV(inst->accel_dev);