mchp: Move general flash definitions into chip
mchp: Move general flash definitions into chip

Move general flash definitions:
 CONFIG_SPI_FLASH_PORT
 CONFIG_SPI_FLASH into config_chip.h
Redefine CONFIG_FLASH_SIZE_BYTES per MEC1727 with
 integrated SPI flash

BRANCH=none
BUG=none
TEST=Build MEC170x/MEC152x boards and sklrvp_mchp172x.

Signed-off-by: martin yan <409cb29bb9001f9bb84010e71644764e5f7609ce@microchip.corp-partner.google.com>
Change-Id: I2dc9af69b0794ec2e3ec11c45be9ff74aa19f561
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2799977
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>
Reviewed-by: Vijay P Hiremath <006c712879a3af08bfdb5c2b8491a8b2d5fd73cd@intel.com>
Reviewed-by: Ravin Kumar <a0e97d6aca75c950342a3a8ebb8bd1c89d88be3e@microchip.com>
Tested-by: Ravin Kumar <a0e97d6aca75c950342a3a8ebb8bd1c89d88be3e@microchip.com>
Commit-Queue: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec