drm: bridge: it66121: Use regmap_noinc_read()

Use regmap_noinc_read() instead of reading the data from the DDC FIFO one
byte at a time.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20221214125821.12489-4-paul@crapouillou.net

drivers/gpu/drm/bridge/ite-it66121.c

@@ -589,13 +589,12 @@ static int it66121_get_edid_block(void *context, u8 *buf,
 		if (ret)
 			return ret;
 
-		do {
-			ret = regmap_read(ctx->regmap, IT66121_DDC_RD_FIFO_REG, &val);
+		ret = regmap_noinc_read(ctx->regmap, IT66121_DDC_RD_FIFO_REG,
+					buf, cnt);
 		if (ret)
 			return ret;
-			*(buf++) = val;
-			cnt--;
-		} while (cnt > 0);
+
+		buf += cnt;
 	}
 
 	return 0;