lora: Fix size of buffer in lora_click_send
lora: Fix size of buffer in lora_click_send

Each byte takes two characters because it is in hex format.
Hence, the size of the buffer must be double the number of
bytes.

Signed-off-by: Francois Berder <0eabc3e9da54407da074ac08d4217d54f5b94915@imgtec.com>

francois-berder/LetMeCreate,francois-berder/LetMeCreate