Write timeouts are expressed in microseconds. Milliseconds are 1000 times
longer than microseconds, not 1000 times shorter.

Before (Intel 28F128J3D75):

CFI conformant FLASH (16 x 16)  Size: 16 MB in 128 Sectors
  Intel Extended command set, Manufacturer ID: 0x89, Device ID: 0x18
  Erase timeout: 4096 ms, write timeout: 256000 ms
  Buffer write timeout: 1024000 ms, buffer size: 32 bytes

After:
  ...
  Erase timeout: 4096 ms, write timeout: 256 us
  Buffer write timeout: 1024 us, buffer size: 32 bytes

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>