media: rockchip: rkisp1: Set DPCC methods enable bits inside loop

The rkisp1_dpcc_config() function looks over methods sets to configure
them, but sets the RKISP1_CIF_ISP_DPCC_METHODS_SET_* registers outside
of the loop with hand-unrolled code. Move this to the loop to simplify
the code.

Signed-off-by: Laurent Pinchart <[e-mail]>
Reviewed-by: Paul Elder <[e-mail]>
Reviewed-by: Dafna Hirschfeld <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/platform/rockchip/rkisp1/rkisp1-params.c

···
 #define RKISP1_ISP_PARAMS_REQ_BUFS_MIN	2
 #define RKISP1_ISP_PARAMS_REQ_BUFS_MAX	8
 
+#define RKISP1_ISP_DPCC_METHODS_SET(n) \
+			(RKISP1_CIF_ISP_DPCC_METHODS_SET_1 + 0x4 * (n))
 #define RKISP1_ISP_DPCC_LINE_THRESH(n) \
 			(RKISP1_CIF_ISP_DPCC_LINE_THRESH_1 + 0x14 * (n))
 #define RKISP1_ISP_DPCC_LINE_MAD_FAC(n) \
···
 	rkisp1_write(params->rkisp1, RKISP1_CIF_ISP_DPCC_SET_USE,
 		     arg->set_use);
 
-	rkisp1_write(params->rkisp1, RKISP1_CIF_ISP_DPCC_METHODS_SET_1,
-		     arg->methods[0].method);
-	rkisp1_write(params->rkisp1, RKISP1_CIF_ISP_DPCC_METHODS_SET_2,
-		     arg->methods[1].method);
-	rkisp1_write(params->rkisp1, RKISP1_CIF_ISP_DPCC_METHODS_SET_3,
-		     arg->methods[2].method);
 	for (i = 0; i < RKISP1_CIF_ISP_DPCC_METHODS_MAX; i++) {
+		rkisp1_write(params->rkisp1, RKISP1_ISP_DPCC_METHODS_SET(i),
+			     arg->methods[i].method);
 		rkisp1_write(params->rkisp1, RKISP1_ISP_DPCC_LINE_THRESH(i),
 			     arg->methods[i].line_thresh);
 		rkisp1_write(params->rkisp1, RKISP1_ISP_DPCC_LINE_MAD_FAC(i),