[media] tda18271: add support for QAM 7 MHz map

This standard is not properly documented, but its settings are at
the tda18271dd driver, and are somewhat obvious, as they follow
the same logic as DVB-T 7MHz.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/common/tuners/tda18271-maps.c

@@ -1213,6 +1213,8 @@ static struct tda18271_std_map tda18271c1_std_map = {
 		      .if_lvl = 1, .rfagc_top = 0x37, }, /* EP3[4:0] 0x1e */
 	.qam_6    = { .if_freq = 4000, .fm_rfn = 0, .agc_mode = 3, .std = 5,
 		      .if_lvl = 1, .rfagc_top = 0x37, }, /* EP3[4:0] 0x1d */
+	.qam_7    = { .if_freq = 4500, .fm_rfn = 0, .agc_mode = 3, .std = 6,
+		      .if_lvl = 1, .rfagc_top = 0x37, }, /* EP3[4:0] 0x1e */
 	.qam_8    = { .if_freq = 5000, .fm_rfn = 0, .agc_mode = 3, .std = 7,
 		      .if_lvl = 1, .rfagc_top = 0x37, }, /* EP3[4:0] 0x1f */
 };
@@ -1244,6 +1246,8 @@ static struct tda18271_std_map tda18271c2_std_map = {
 		      .if_lvl = 1, .rfagc_top = 0x37, }, /* EP3[4:0] 0x1d */
 	.qam_6    = { .if_freq = 4000, .fm_rfn = 0, .agc_mode = 3, .std = 5,
 		      .if_lvl = 1, .rfagc_top = 0x37, }, /* EP3[4:0] 0x1d */
+	.qam_7    = { .if_freq = 4500, .fm_rfn = 0, .agc_mode = 3, .std = 6,
+		      .if_lvl = 1, .rfagc_top = 0x37, }, /* EP3[4:0] 0x1e */
 	.qam_8    = { .if_freq = 5000, .fm_rfn = 0, .agc_mode = 3, .std = 7,
 		      .if_lvl = 1, .rfagc_top = 0x37, }, /* EP3[4:0] 0x1f */
 };

drivers/media/common/tuners/tda18271.h

@@ -53,6 +53,7 @@ struct tda18271_std_map {
 	struct tda18271_std_map_item dvbt_7;
 	struct tda18271_std_map_item dvbt_8;
 	struct tda18271_std_map_item qam_6;
+	struct tda18271_std_map_item qam_7;
 	struct tda18271_std_map_item qam_8;
 };