Update PERCPU_SECTION and RW_DATA_SECTION to align to L1_CACHE_BYTES
instead of hard coded 64 bytes since L1_CACHE_BYTES could get
updated to more than 64 bytes cacheline size.
Change-Id: I0bc1f0420675cf65e958c53a230357918f05aabc
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>