staging: fbtft: fix code indent should use tabs where possible

This patch fixes the following checkpatch.pl error:
code indent should use tabs where possible
Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fbtft/fb_ili9486.c

@@ -44,13 +44,13 @@ static int default_init_sequence[] = {
 	-1, 0xC5, 0x00, 0x00, 0x00, 0x00,
 	/* PGAMCTRL(Positive Gamma Control) */
 	-1, 0xE0, 0x0F, 0x1F, 0x1C, 0x0C, 0x0F, 0x08, 0x48, 0x98,
-	          0x37, 0x0A, 0x13, 0x04, 0x11, 0x0D, 0x00,
+		  0x37, 0x0A, 0x13, 0x04, 0x11, 0x0D, 0x00,
 	/* NGAMCTRL(Negative Gamma Control) */
 	-1, 0xE1, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75,
-	          0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
+		  0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
 	/* Digital Gamma Control 1 */
 	-1, 0xE2, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75,
-	          0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
+		  0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
 	/* Sleep OUT */
 	-1, 0x11,
 	/* Display ON */