[PATCH] staging: pi433: fix missing break in switch statement.

[Al Viro]

On Thu, Nov 09, 2017 at 05:19:55PM +0000, Colin King wrote:
> From: Colin Ian King <colin.king at canonical.com>
> 
> The PI433_IOC_WR_RX_CFG case is missing a break and will fall through
> to the default case and errorenously return -EINVAL. Fix this by
> adding in missing break.

Folded and pushed...