drivers: stm32_reset adapt interface to timeout argument ...

Changes stm32mp1 reset driver to API to add a timeout argument
to stm32mp_reset_assert() and stm32mp_reset_deassert() and
a return value.

With a supplied timeout, the functions wait the target reset state
is reached before returning. With a timeout of zero, the functions
simply load target reset state in SoC interface and return without
waiting.

Helper functions stm32mp_reset_set() and stm32mp_reset_release()
use a zero timeout and return without a return code.

This change updates few stm32 drivers and plat/stm32mp1 blé_plat_setup.c
accordingly without any functional change.
functional change.

Change-Id: Ia1a73a15125d3055fd8739c125b70bcb9562c27f
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>

nand: stm32_fmc2_nand: correct xor_ecc.val assigned value ...

The variable is wrongly set to 0L, whereas it is an unsigned int, it should
then be 0U.

Change-Id: I0b164c0ea598ec8a503f1693da2f3789f59da238
Signed-off-by: Yann Gautier <yann.gautier@st.com>

fmc: stm32_fmc2_nand: Add FMC2 driver support ...

Add fmc2_nand driver support. The driver implements
only read interface for NAND devices.

Change-Id: I3cd037e8ff645ce0d217092b96f33ef41cb7a522
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Christophe Kerello <christophe.kerello@st.com>