Bluetooth: Mesh: Use u8_t instead of bitfields for 8-bit wide values
Bluetooth: Mesh: Use u8_t instead of bitfields for 8-bit wide values

It's cleaner to use single u8_t variables for values which require
exactly 8 bits.

Signed-off-by: Johan Hedberg <628991c7b0a19c384f9b99c21ec330ce952bb838@intel.com>

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