[binutils-gdb] Use mips_regnum instead of constants for FreeBSD/mips register operations.

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT f7241d4f27cd59357a75bf802e9ffa7d95036deb ***

Author: John Baldwin <jhb@FreeBSD.org>
Branch: master
Commit: f7241d4f27cd59357a75bf802e9ffa7d95036deb

Use mips_regnum instead of constants for FreeBSD/mips register operations.

gdb/ChangeLog:

	* mips-fbsd-tdep.c (MIPS_PC_REGNUM): Remove.
	(MIPS_FP0_REGNUM): Remove.
	(MIPS_FSR_REGNUM): Remove.
	(mips_fbsd_supply_fpregs): Use mips_regnum.
	(mips_fbsd_supply_gregs): Likewise.
	(mips_fbsd_collect_fpregs): Likewise.
	(mips_fbsd_collect_gregs): Likewise.