pwm: bcm-kona: Remove impossible comparison when validating duty cycle

'dc' here is an unsigned long, thus checking for <0 will always
evaluate to false.

Fixes the following W=1 warning:

 drivers/pwm/pwm-bcm-kona.c:141:35: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]

Cc: Florian Fainelli <[email protected]>
Cc: Ray Jui <[email protected]>
Cc: Scott Branden <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Lee Jones <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>

0 files changed, 0 insertions, 0 deletions