staging: et131x: Fix variable typo carry_reg1 -> carry_reg2

This mistake was introduced in the patch 'staging: et131x: Convert et1310_address_map.h names from camel case'
Signed-off-by: NMark Einon <mark.einon@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/et131x/et1310_mac.c

@@ -526,7 +526,7 @@ void et1310_handle_macstat_interrupt(struct et131x_adapter *etdev)
 	carry_reg1 = readl(&etdev->regs->macstat.carry_reg1);
 	carry_reg2 = readl(&etdev->regs->macstat.carry_reg2);
 
-	writel(carry_reg2, &etdev->regs->macstat.carry_reg1);
+	writel(carry_reg1, &etdev->regs->macstat.carry_reg1);
 	writel(carry_reg2, &etdev->regs->macstat.carry_reg2);
 
 	/* We need to do update the host copy of all the MAC_STAT counters.