flash/nor/spi: add micron MT25QU01G

1Gbit SPI flash on VCU118 Rev. 2.0

Contributed to riscv-openocd in https://github.com/riscv/riscv-openocd/pull/487

Signed-off-by: Tim Newsome <tim@sifive.com>
Change-Id: I93447dd970d9901a671567fe8ab9e407432f8db9
Reviewed-on: https://review.openocd.org/c/openocd/+/6764
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins