scsi: ufs-mediatek: Make some symbols static

Fix sparse warnings:

drivers/scsi/ufs/ufs-mediatek.c:19:6: warning: symbol 'ufs_mtk_cfg_unipro_cg' was not declared. Should it be static?
drivers/scsi/ufs/ufs-mediatek.c:55:5: warning: symbol 'ufs_mtk_bind_mphy' was not declared. Should it be static?
drivers/scsi/ufs/ufs-mediatek.c:342:27: warning: symbol 'ufs_mtk_of_match' was not declared. Should it be static?
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufs-mediatek.c

@@ -16,7 +16,7 @@
 #include "unipro.h"
 #include "ufs-mediatek.h"
 
-void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable)
+static void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable)
 {
 	u32 tmp;
 
@@ -52,7 +52,7 @@ void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable)
 	}
 }
 
-int ufs_mtk_bind_mphy(struct ufs_hba *hba)
+static int ufs_mtk_bind_mphy(struct ufs_hba *hba)
 {
 	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
 	struct device *dev = hba->dev;
@@ -339,7 +339,7 @@ static int ufs_mtk_remove(struct platform_device *pdev)
 	return 0;
 }
 
-const struct of_device_id ufs_mtk_of_match[] = {
+static const struct of_device_id ufs_mtk_of_match[] = {
 	{ .compatible = "mediatek,mt8183-ufshci"},
 	{},
 };