style(partition): use GUID values for GPT partition fields

The GPT partition uses GUID values for identification of partition
types and partitions. Change the relevant functions to use GUID values
instead of UUID's.

Change-Id: I30df66a8a02fb502e04b0285f34131b65977988e
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
2 files changed