gensyscalls: alignment fixup for ARM

ARM ABI has different alignment requirements based on parameter size:
* parameters not larger than 4 bytes are aligned on 4 bytes
* parameters larger than 4 byte

gensyscalls: alignment fixup for ARM

ARM ABI has different alignment requirements based on parameter size:
* parameters not larger than 4 bytes are aligned on 4 bytes
* parameters larger than 4 bytes are aligned on 8 bytes

see:
Procedure Call Standard for the Arm Architecture
sections 5.1, Fundamental Data Types
and 6.5, Parameter Passing

Therefore the following changes are introduced in gensyscalls tool:
* new optional define SYSCALL_LONG_PARAMETER_ALIGNMENT_TYPE is introduced
* it's defined only on ARM
* on other architectures it takes on the value of SYSCALL_PARAMETER_ALIGNMENT_TYPE as a default
* constants kLongParameterAlignmentType and kLongParameterAlignmentSize are introduced
* Syscall::AddParameter uses this value for aligning parameters larger than 4 bytes

Change-Id: I7e766e0ea9d07001643e813722b462b1f044921a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5112
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

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kernel & addons: Build with the non-legacy GCC even on x86_gcc2h.

Only one code change: for some reason, GCC chokes on the cr3 functions
as macros (throwing errors about invalid registers.) The BSDs

kernel & addons: Build with the non-legacy GCC even on x86_gcc2h.

Only one code change: for some reason, GCC chokes on the cr3 functions
as macros (throwing errors about invalid registers.) The BSDs have them
as inline functions instead, so they are converted to that here.

Tested and working. There seems to be about a 10% decrease in CPU time
on some compilation benchmarks that I briefly tried.

Change-Id: I31666297394d7619f83fca6ff5f933ddd6f07420
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4515
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

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