net/qede/base: add various OS abstraction macros

net/qede/base: add various OS abstraction macros

- Introduce OSAL_IOV_VF_VPORT_STOP to allow VF to carry out required
   operations and prevent a potential assert before closing vport
 - Add OSAL_DIV_S64() for 64-bit division on 32-bit platforms.
 - Add OSAL for transceiver update OSAL_TRANSCEIVER_UPDATE()
 - Add OSAL for MFW command preemption OSAL_MFW_CMD_PREEMPT() within the
   spinning loops while sending a mailbox command to the MFW
 - Implement OSAL_SPIN_LOCK_IRQSAVE macro
 - Rename OSAL_NUM_ACTIVE_CPU() to OSAL_NUM_CPUS()

Signed-off-by: Rasesh Mody <rasesh.mody@cavium.com>