realtek_mst_i2c_spi.c: Update PAGE_SIZE and fix write

Update the PAGE_SIZE to 128 as fix r/w on different devices,
also fix the write page mapping for it.

TEST=build and run flashrom to read&write on multiple devices

Signed-off-by: Shiyu Sun <>
Change-Id: Ifcdd3548519eb37440e67fcf6206279cff05b159
Tested-by: build bot (Jenkins) <>
Reviewed-by: Edward O'Callaghan <>
Reviewed-by: Angel Pons <>
1 file changed