[PATCH for 4.19] Revert "spi: mt7621: Fix an error message in mt7621_spi_probe()"

[Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@xxxxxxxxxxxxx>]

This reverts commit 269f650a0b26067092873308117e0bf0c6ec8289 which is
commit 2b2bf6b7faa9010fae10dc7de76627a3fdb525b3 upstream.

dev_err_probe() does not suppot in 4.19.y. So this driver will fail to
build.

```
  CC      drivers/staging/mt7621-spi/spi-mt7621.o
drivers/staging/mt7621-spi/spi-mt7621.c: In function 'mt7621_spi_probe':
drivers/staging/mt7621-spi/spi-mt7621.c:446:24: error: implicit declaration of function 'dev_err_probe'; did you mean 'device_reprobe'? [-Werror=implicit-function-declaration]
  446 |                 return dev_err_probe(&pdev->dev, PTR_ERR(clk),
      |                        ^~~~~~~~~~~~~
      |                        device_reprobe
```

Signed-off-by: Nobuhiro Iwamatsu (CIP) <nobuhiro1.iwamatsu@xxxxxxxxxxxxx>
---
 drivers/staging/mt7621-spi/spi-mt7621.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/mt7621-spi/spi-mt7621.c b/drivers/staging/mt7621-spi/spi-mt7621.c
index b73823830e3a73..75ed48f60c8c7f 100644
--- a/drivers/staging/mt7621-spi/spi-mt7621.c
+++ b/drivers/staging/mt7621-spi/spi-mt7621.c
@@ -442,9 +442,11 @@ static int mt7621_spi_probe(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	clk = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(clk))
-		return dev_err_probe(&pdev->dev, PTR_ERR(clk),
-				     "unable to get SYS clock\n");
+	if (IS_ERR(clk)) {
+		dev_err(&pdev->dev, "unable to get SYS clock, err=%d\n",
+			status);
+		return PTR_ERR(clk);
+	}
 
 	status = clk_prepare_enable(clk);
 	if (status)
-- 
2.36.1