re PR target/57260 (Generated R_MIPS_GOT_MIPS relocation for direct function call while compiling with -O2 on MIPS N64)

gcc/
	PR target/57260
	* config/mips/mips.c (mips_function_ok_for_sibcall): Don't allow
	sibling calls to functions that would normally be lazily bound,
	unless $gp is call-clobbered.

gcc/testsuite/
	PR target/57260
	* gcc.target/mips/call-1.c: Restrict to o32.
	* gcc.target/mips/call-5.c, gcc.target/mips/call-6.c: New test.

From-SVN: r198945