detail: Enable PWM-flash in the kernel for pwm flash Change-Id: I71913dff147dc26eab0ed80e03775771e1268e3d Signed-off-by: longc106 <longc106@motorola.com> Reviewed-on: https://gerrit.mot.com/2208199 SME-Granted: SME Approvals Granted SLTApproved: Slta Waiver Tested-by: Jira Key Reviewed-by: Pengfei Qiao <qiaopf1@motorola.com> Reviewed-by: XiaoFeng Wang <wangxf32@lenovo.com> Reviewed-by: Long Cheng <chengl1@motorola.com> Reviewed-by: Zhichao Chen <chenzc2@motorola.com> Submit-Approved: Jira Key