input: pmic8xxx-pwrkey: Keep pdata after probe
input: pmic8xxx-pwrkey: Keep pdata after probe

The missing bits from upstream vs internal version of this driver

Signed-off-by: Stephen Boyd <010521127f513270fe503d86ab8316ac5147f4b7@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas