defconfig: sdm845: enable compilation of MDSS PLL driver for 10nm

Add necessary configuration to enable compilation of MDSS
10nm PLL driver which is now based on common clock framework.

Change-Id: I8b84a178b9d87ea7fbe933bace878550bc7cc2e5
Signed-off-by: Shashank Babu Chinta Venkata <sbchin@codeaurora.org>