staging: sm750fb: Kconfig: Fix spelling mistake "accelearion" -> "acceleration"

There is a spelling mistake in a Kconfig description. Fix it.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20221007202941.2756304-1-colin.i.king@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/sm750fb/Kconfig

@@ -8,7 +8,7 @@ config FB_SM750
 	select FB_CFB_IMAGEBLIT
 	help
 	  Frame buffer driver for the Silicon Motion SM750 chip
-	  with 2D accelearion and dual head support.
+	  with 2D acceleration and dual head support.
 
 	  This driver is also available as a module. The module will be
 	  called sm750fb. If you want to compile it as a module, say M