ANDROID: sched/fair: fix a warning

Below warning got introduced by 'commit 2cc3df5e
("ANDROID: sched: Update max cpu capacity in case of
max frequency constraints")':

warning: '&&' within '||' [-Wlogical-op-parentheses]

Add parentheses required to fix the warning.

Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>