drm/panel: ili9341: Add comments for registers in ili9341_config()

Add detail comments for registers definitions in struct ili9341_config().
Replace TODO with comment for each registers.

Signed-off-by: Abhishek Tamboli <abhishektamboli9@gmail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240819175122.33176-1-abhishektamboli9@gmail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240819175122.33176-1-abhishektamboli9@gmail.com

Author: Abhishek-Tamboli9

drivers/gpu/drm/panel/panel-ilitek-ili9341.c

@@ -121,19 +121,19 @@ struct ili9341_config {
 	const struct drm_display_mode mode;
 	/* ca: TODO: need comments for this register */
 	u8 ca[ILI9341_CA_LEN];
-	/* power_b: TODO: need comments for this register */
+	/* power_b: Power control B (CFh) */
 	u8 power_b[ILI9341_POWER_B_LEN];
-	/* power_seq: TODO: need comments for this register */
+	/* power_seq: Power on sequence control (EDh) */
 	u8 power_seq[ILI9341_POWER_SEQ_LEN];
-	/* dtca: TODO: need comments for this register */
+	/* dtca: Driver timing control A (E8h) */
 	u8 dtca[ILI9341_DTCA_LEN];
-	/* dtcb: TODO: need comments for this register */
+	/* dtcb: Driver timing control B (EAh) */
 	u8 dtcb[ILI9341_DTCB_LEN];
-	/* power_a: TODO: need comments for this register */
+	/* power_a: Power control A (CBh) */
 	u8 power_a[ILI9341_POWER_A_LEN];
 	/* frc: Frame Rate Control (In Normal Mode/Full Colors) (B1h) */
 	u8 frc[ILI9341_FRC_LEN];
-	/* prc: TODO: need comments for this register */
+	/* prc: Pump ratio control (F7h) */
 	u8 prc;
 	/* dfc_1: B6h DISCTRL (Display Function Control) */
 	u8 dfc_1[ILI9341_DFC_1_LEN];
@@ -147,7 +147,7 @@ struct ili9341_config {
 	u8 vcom_2;
 	/* address_mode: Memory Access Control (36h) */
 	u8 address_mode;
-	/* g3amma_en: TODO: need comments for this register */
+	/* g3amma_en: Enable 3G (F2h) */
 	u8 g3amma_en;
 	/* rgb_interface: RGB Interface Signal Control (B0h) */
 	u8 rgb_interface;