[MIPS] Malta: Use C89 style for comments

Remove comments in C99 style and make checkpatch.pl happy.

No functional changes introduced.
Signed-off-by: NDmitri Vorobiev <dmitri.vorobiev@gmail.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/mips-boards/malta/malta_int.c

@@ -214,9 +214,9 @@ static inline unsigned int irq_ffs(unsigned int pending)
 
 	t0 = pending & 0x8000;
 	t0 = t0 < 1;
-	//t0 = t0 << 2;
+	/* t0 = t0 << 2; */
 	a0 = a0 - t0;
-	//pending = pending << t0;
+	/* pending = pending << t0; */
 
 	return a0;
 #endif