drivers: spi: sh_qspi.c: Use log_warning() instead of printf()

Use log_warning() instead of printf() to print out driver information

Signed-off-by: Pengfei Fan <fanpengfei1@eswincomputing.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/drivers/spi/sh_qspi.c b/drivers/spi/sh_qspi.c
index 5ba8a8e..861423b 100644
--- a/drivers/spi/sh_qspi.c
+++ b/drivers/spi/sh_qspi.c
@@ -6,6 +6,8 @@
  * Copyright (C) 2013 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
  */
 
+#define LOG_CATEGORY UCLASS_SPI
+
 #include <common.h>
 #include <console.h>
 #include <malloc.h>
@@ -160,7 +162,7 @@
 	}
 
 	if (bitlen % 8) {
-		printf("%s: bitlen is not 8bit alined %d", __func__, bitlen);
+		log_warning("bitlen is not 8bit aligned %d", bitlen);
 		return 1;
 	}