ASoC: codecs: add missing max_register in regmap config

For some reason setting max_register was missed from regmap_config.
Without this cat /sys/kernel/debug/regmap/sdw:0:217:2010:0:1/range
actually throws below Warning.

WARNING: CPU: 7 PID: 540 at drivers/base/regmap/regmap-debugfs.c:160
 regmap_debugfs_get_dump_start.part.10+0x1e0/0x220
...
Call trace:
 regmap_debugfs_get_dump_start.part.10+0x1e0/0x220
 regmap_reg_ranges_read_file+0xc0/0x2e0
 full_proxy_read+0x64/0x98
 vfs_read+0xa8/0x1e0
 ksys_read+0x6c/0x100
 __arm64_sys_read+0x1c/0x28
 el0_svc_common.constprop.3+0x6c/0x190
 do_el0_svc+0x24/0x90
 el0_svc+0x14/0x20
 el0_sync_handler+0x90/0xb8
 el0_sync+0x158/0x180
...

Fixes: a0aab9e1 ("ASoC: codecs: add wsa881x amplifier support")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210201161429.28060-1-srinivas.kandagatla@linaro.org


Signed-off-by: Mark Brown <broonie@kernel.org>