[nrf fromlist] drivers: flash: mspi_nor: support MODE_SINGLE and MODE_QUAD_1_4_4

Extend driver to support single lane and 1-4-4 IO modes.

Upstream PR #: 85520

Signed-off-by: Marcin Szymczyk <[email protected]>
(cherry picked from commit dd02c86)

Author: masz-nordic