platform/x86: yogabook: Clean up code style

platform/x86: yogabook: Clean up code style

This commit cleans up the following checks flagged by checkpatch in
yogabook.c:

- CHECK: Prefer kernel type 'u8' over 'uint8_t'
- CHECK: Comparison to NULL could be written "!data"
- CHECK: line length of ... exceeds 100 columns

Signed-off-by: Benjamin Philip <benjamin.philip495@gmail.com>
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Link: https://patch.msgid.link/20260101141657.54258-1-benjamin.philip495@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>