nfc: mrvl: remove useless "continue" at end of loop

The "continue" statement at the end of a for loop does not have an
effect.  Entire loop contents can be slightly simplified to increase
code readability.  No functional change.

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>