mtd: pmc551: Remove set but not used variable 'soff_lo'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/mtd/devices/pmc551.c: In function pmc551_erase:
drivers/mtd/devices/pmc551.c:142:15: warning: variable soff_lo set but not used [-Wunused-but-set-variable]
drivers/mtd/devices/pmc551.c: In function pmc551_read:
drivers/mtd/devices/pmc551.c:232:15: warning: variable soff_lo set but not used [-Wunused-but-set-variable]
drivers/mtd/devices/pmc551.c: In function pmc551_write:
drivers/mtd/devices/pmc551.c:289:15: warning: variable soff_lo set but not used [-Wunused-but-set-variable]

It is not used since commit cdf0a7d16980 ("[MTD]
pmc551 whitespace cleanup")

Reported-by: Hulk Robot <[e-mail]>
Signed-off-by: zhengbin <[e-mail]>
Signed-off-by: Richard Weinberger <[e-mail]>

drivers/mtd/devices/pmc551.c

···
 static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr)
 {
 	struct mypriv *priv = mtd->priv;
-	u32 soff_hi, soff_lo;	/* start address offset hi/lo */
+	u32 soff_hi;		/* start address offset hi */
 	u32 eoff_hi, eoff_lo;	/* end address offset hi/lo */
 	unsigned long end;
 	u_char *ptr;
···
 	eoff_hi = end & ~(priv->asize - 1);
 	soff_hi = instr->addr & ~(priv->asize - 1);
 	eoff_lo = end & (priv->asize - 1);
-	soff_lo = instr->addr & (priv->asize - 1);
 
 	pmc551_point(mtd, instr->addr, instr->len, &retlen,
 		     (void **)&ptr, NULL);
···
 			size_t * retlen, u_char * buf)
 {
 	struct mypriv *priv = mtd->priv;
-	u32 soff_hi, soff_lo;	/* start address offset hi/lo */
+	u32 soff_hi;		/* start address offset hi */
 	u32 eoff_hi, eoff_lo;	/* end address offset hi/lo */
 	unsigned long end;
 	u_char *ptr;
···
 	end = from + len - 1;
 	soff_hi = from & ~(priv->asize - 1);
 	eoff_hi = end & ~(priv->asize - 1);
-	soff_lo = from & (priv->asize - 1);
 	eoff_lo = end & (priv->asize - 1);
 
 	pmc551_point(mtd, from, len, retlen, (void **)&ptr, NULL);
···
 			size_t * retlen, const u_char * buf)
 {
 	struct mypriv *priv = mtd->priv;
-	u32 soff_hi, soff_lo;	/* start address offset hi/lo */
+	u32 soff_hi;		/* start address offset hi */
 	u32 eoff_hi, eoff_lo;	/* end address offset hi/lo */
 	unsigned long end;
 	u_char *ptr;
···
 	end = to + len - 1;
 	soff_hi = to & ~(priv->asize - 1);
 	eoff_hi = end & ~(priv->asize - 1);
-	soff_lo = to & (priv->asize - 1);
 	eoff_lo = end & (priv->asize - 1);
 
 	pmc551_point(mtd, to, len, retlen, (void **)&ptr, NULL);