leds: lgm-sso: Fix clock handling

leds: lgm-sso: Fix clock handling

[ Upstream commit fba8a6f2263bc54683cf3fd75df4dbd5d041c195 ]

The clock handling has a few issues:
 - when getting second clock fails, the first one left prepared and enabled
 - on ->remove() clocks are unprepared and disabled twice

Fix all these by converting to use bulk clock operations since both clocks
are mandatory.

Fixes: c3987cd2bca3 ("leds: lgm: Add LED controller driver for LGM SoC")
Cc: Amireddy Mallikarjuna reddy <mallikarjunax.reddy@linux.intel.com>
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>