include: linux: Correct MHI_MAX_CHANNELS macro

Increment MHI_MAX_CHANNELS macro by 1 to account for the
ADPL HW channel.

Change-Id: I97c7023a7a63f6bfdcfbebb32537a71a5dcbf433
Signed-off-by: Siva Kumar Akkireddi <sivaa@codeaurora.org>
1 file changed