misc: amd-sbi: Extend support for MCAMSR protocol for rev 0x21

misc: amd-sbi: Extend support for MCAMSR protocol for rev 0x21

- MCAMSR protocol for revision 0x21 is updated to include the
  extended thread supported by the platform.
- This modifies the existing protocol to include additional byte
  to provide high thread number.
- New input structure is defined to address this, as the hardware
  protocol is tightly coupled with the input structure length

Reviewed-by: Naveen Krishna Chatradhi <naveenkrishna.chatradhi@amd.com>
Signed-off-by: Akshay Gupta <akshay.gupta@amd.com>
Link: https://patch.msgid.link/20250915103649.1705078-6-akshay.gupta@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>