mfd: max14577: Remove redundant initialization of variable current_bits

The variable current_bits is being initialized with a value that is
never read and it is being updated later with a new value. The
initialization is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

drivers/mfd/max14577.c

···
 int maxim_charger_calc_reg_current(const struct maxim_charger_current *limits,
 		unsigned int min_ua, unsigned int max_ua, u8 *dst)
 {
-	unsigned int current_bits = 0xf;
+	unsigned int current_bits;
 
 	if (min_ua > max_ua)
 		return -EINVAL;