With the use of the IS_ENABLED macro
(https://gerrit.zephyrproject.org/r/#/c/9882), the driver
reentrancy code is simplified:
The original const variable which used to serve the purpose of
making the build to compile out the reentrancy code when the
reentrancy configuration flag is not enabled is no longer
needed as the use of the IS_ENABLED macro achieves the same result.
Also the original 3 wrapper functions around semaphores API are
not necessary; instead, just use the semaphore API directly.
Jira: ZEP-1251
Change-Id: I23552b77d19044dc94de443018759cb3ec10a52b
Signed-off-by: Kuo-Lang Tseng <kuo-lang.tseng@intel.com>
c0a546ed33