When lmaRegion is non-null, respect the output section alignment.
This rule is analogous to switchTo(sec) which advances sh_addr (VMA).
This fixes the p_paddr misalignment issue as reported by
linkerscript/align-lma.s has a FIXME that demonstrates another bug:
.bss ... >RAM should be placed in a different PT_LOAD (GNU ld
behavior) because its lmaRegion (nullptr) is different from the previous
section's lmaRegion (ROM).