staging: iio: accel: Remove unnecessary else after goto in if block

This patch removes the unnecessary else following an if block with a
goto statement.

Signed-off-by: Janani Ravichandran <janani.rvchndrn@gmail.com>
Acked-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>