[ARM] at91_adc parenthesis balance
Trivial unbalanced parenthesis macro fix.
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
authored by Mariusz Kozlowski and committed by Russell King fc432e19 69e9c93d