net: smc911x: Adjust indentation in smc911x_phy_configure

Clang warns:

../drivers/net/ethernet/smsc/smc911x.c:939:3: warning: misleading
indentation; statement is not part of the previous 'if'
[-Wmisleading-indentation]
         if (!lp->ctl_rfduplx)
         ^
../drivers/net/ethernet/smsc/smc911x.c:936:2: note: previous statement
is here
        if (lp->ctl_rspeed != 100)
        ^
1 warning generated.

This warning occurs because there is a space after the tab on this line.
Remove it so that the indentation is consistent with the Linux kernel
coding style and clang no longer warns.

Fixes: 0a0c72c ("[PATCH] RE: [PATCH 1/1] net driver: Add support for SMSC LAN911x line of ethernet chips")
Link: ClangBuiltLinux#796
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>

drivers/net/ethernet/smsc/smc911x.c

@@ -936,7 +936,7 @@ static void smc911x_phy_configure(struct work_struct *work)
 	if (lp->ctl_rspeed != 100)
 		my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
 
-	 if (!lp->ctl_rfduplx)
+	if (!lp->ctl_rfduplx)
 		my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
 
 	/* Update our Auto-Neg Advertisement Register */