MIPS: Fix delay slot emulation count in debugfs

Commit 432c6bacbd0c ("MIPS: Use per-mm page to execute branch delay slot
instructions") accidentally removed use of the MIPS_FPU_EMU_INC_STATS
macro from do_dsemulret, leading to the ds_emul file in debugfs always
returning zero even though we perform delay slot emulations.

Fix this by re-adding the use of the MIPS_FPU_EMU_INC_STATS macro.

Signed-off-by: Paul Burton <[e-mail]>
Fixes: 432c6bacbd0c ("MIPS: Use per-mm page to execute branch delay slot instructions")
Cc: [e-mail]
Patchwork: https://patchwork.linux-mips.org/patch/14301/
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/math-emu/dsemul.c

···
 	/* Set EPC to return to post-branch instruction */
 	xcp->cp0_epc = current->thread.bd_emu_cont_pc;
 	pr_debug("dsemulret to 0x%08lx\n", xcp->cp0_epc);
+	MIPS_FPU_EMU_INC_STATS(ds_emul);
 	return true;
 }