fbdev: mmp: Fix typo and wording in code comment

Fixes: 641b4b1b ("video: mmpdisp: add spi port in display controller")
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Helge Deller <deller@gmx.de>

drivers/video/fbdev/mmp/hw/mmp_spi.c

@@ -91,7 +91,7 @@ static int lcd_spi_setup(struct spi_device *spi)
 	writel(tmp, reg_base + LCD_SPU_SPI_CTRL);
 
 	/*
-	 * After set mode it need a time to pull up the spi singals,
+	 * After set mode it needs some time to pull up the spi signals,
 	 * or it would cause the wrong waveform when send spi command,
 	 * especially on pxa910h
 	 */