Semaphore maximum count is hardcoded to 128

In the API: ble_npl_sem_init, there is no way to define the maximum count for the semaphore being created, and this is left to the OS-specific implementation, like the API: npl_freertos_sem_init that defines this max value to 128.

Proposed solution: Add additional argument to the API: ble_npl_sem_init to define the maximum semaphore count, and this max value is to be passed to the OS-specific implementation.

Locate the ble_npl_sem_init API and the OS-specific npl_freertos_sem_init implementation first. Trace other OS-specific semaphore implementations and their callers to determine the required signature changes. Done means the maximum count is supplied through the common API and passed to each OS-specific implementation instead of using the hardcoded value 128.

Written by the indexing model from the issue text.