c1_LIR.hpp defines a row of functions guarded by platform
defines. This is bad style and hinders new platform ports.

This change removes the majority of these defines. It introduces
common headers, and moves implementations to c1_LIR_<cpu>.cpp files.

It guards single_softfp() and double_softfp() by __SOFTFP__.
This is not used in any openJdk platform. I can not test this
on the closed platforms ARM32 and PPC32.

It removes the guard around the LIR_Address constructor. There
is no point in guarding this code, verify() assures by
assertions it can not be misused. I also introduce a new
constructor that leaves out the scale argument.

This change also moves verify() to the new platform files. In the
header, LIR_ADDRESS_PD_VERIFY was used. Neither this nor pd_verify()
are used in openJdk. If this define is used in the closed ports
pd_verify() must be renamed to verify().

The code that was prviously guarded by ARM, ARM32 or PPC32 is
moved to a properly guarded section in c1_LIR.cpp. Actually,
it should be moved to according new files c1_LIR_<cpu>.cpp in
the closed ports. But this way the change should basically
work for the closed ports.

Similarly, this change cleans up generate_stack_overflow_check() in templateInterpreterGenerator.hpp which
was defined with different amounts of registers for each platform guarded with #defines. Instead, register
arguments are initialized by default with 'noreg'.