Create a function to check for fpga readiness, and move the checking out
of bridge enable function.

Signed-off-by: Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: I3f473ffeffa9ce181a48977560c8bda19c6123c0

Mailbox driver now handles variable response length

Signed-off-by: Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: Ic96854fdaadaf48379c5de688392df974e1c99c3

Modify mailbox config return code to improve debugging.

Signed-off-by: Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: I0a223291f4c5296203b3295a679a5857a446c692

Fix mailbox driver urgent command handling, doorbell routine,
and logic optimization.

Signed-off-by: Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: If536a383f449ca2a68d60274303ec24f92411505

There are a few issues in mailbox that needs to be fixed.
- Send doorbell after an indirect cmd
- Do not ring doorbell when polling mailbox response as it should've been
sent by send_cmd
- remove unneeded cmd_free_offset check
- Fix mailbox initialization
- Fix get_config_status returning a wrong status when the status is busy
- Add command length in mailbox command header

Signed-off-by: Tien Hock, Loh <tien.hock.loh@intel.com>
Change-Id: If613e2ca889a540a616c62d69ad0086a7cd46536

Move the get_config_status out of sip_svc driver.
Modify the function so that it can return either
CONFIG_STATUS or RECONFIG_STATUS

Signed-off-by: Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: I642d5900339e67f98be61380edc2b838e0dd47af

Pull out mailbox driver into common area as they can be shared between
intel's socfpga platform

Signed-off-by: Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: I4064de1ec668931d77abcb7804f6952b70d33716