Revert "Adding printf statements to pal_lld.c and replaced pal_lld.h..."

This reverts commit 6b2916bd3de57503d02468b1d1722ef8ed973fc2.
don't use broken rtc in demo
add chtypes.h
add rules.mk
Merge branch 'stable_2.6.x' of github.com:PSAScapstone2014/ChibiOS-RT into stable_2.6.x
add GPIO identifiers; initial Posix port - needs work; fixup pal
Merge branch 'stable_2.6.x' of github.com:PSAScapstone2014/ChibiOS-RT into stable_2.6.x
shouldn't have been pushed