icnss: Fix enum-conversion warning from Clang

../drivers/soc/qcom/icnss.c:3154:37: warning: implicit conversion from
enumeration type 'enum icnss_driver_mode' to different enumeration type
'enum wlfw_driver_mode_enum_v01' [-Wenum-conversion]
        ret = wlfw_wlan_mode_send_sync_msg(mode);
              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^~~~
1 warning generated.

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: improbir <ghosh_probir@yahoo.com>