leds: leds-qpnp: add workaround for controlling GPLED output

There is a hardware limitation in the case of PM8941 where
enabling any of the GPLEDx requires enabling of GPLED1. Hence,
lpg channel 9 corresponding to GPLED1 should be enabled before
enabling any other lpg channels corresponding to other GPLEDs.

CRs-Fixed: 723698
Change-Id: If7fe6f26ed3d617e823e0a615ee2d6185d68c5bb
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
Signed-off-by: Abinaya P <abinayap@codeaurora.org>