MIPS: SNI: Fix GCC 4.6.0 build error

CC arch/mips/sni/time.o
arch/mips/sni/time.c: In function 'dosample':
arch/mips/sni/time.c:98:19: error: variable 'lsb' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors

Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/sni/time.c

···
 static __init unsigned long dosample(void)
 {
 	u32 ct0, ct1;
-	volatile u8 msb, lsb;
+	volatile u8 msb;
 
 	/* Start the counter. */
 	outb_p(0x34, 0x43);
···
 	/* Latch and spin until top byte of counter0 is zero */
 	do {
 		outb(0x00, 0x43);
-		lsb = inb(0x40);
+		(void) inb(0x40);
 		msb = inb(0x40);
 		ct1 = read_c0_count();
 	} while (msb);