This fixes TCP retransmissions and timeouts on large
file transfers over HTTP

This commit adds support for GPIO interrupts in GPIO driver for Litex
SoC Builder.
Signed-off-by: Robert Szczepanski <rszczepanski@internships.antmicro.com>

This is a temporary workaround to Zephyr bug #34403
This revert restores all Kestrel functionality, and
also fixes hard lockups under heavy load that were
introduced by the logger v2 merge.

This avoids a long delay at startup while the heap memory
area is zeroed out.  We have no real reason to require
newly allocated memory to be cleared out on the Kestrel
system, and clearing the memory adds 10 seconds or so
to startup on current Kestrel hardware.

Note: DPD is only supported on the first NOR
device in the device tree.  This limitation
can be addressed in a second patch for this
driver.

Add a function that uses the JESD216 SFDP BFP DW16 Enter 4-Byte
Addressing parameter to put the device into 4-byte addressing mode if
one of the entry modes that's supported by the driver is available on
the device.

Perform the transition if SFDP data is provided (either by devicetree
or at runtime), or if a special devicetree property provides the entry
mode descriptor.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>

Add a helper function to decode the address byte support data from the
SFDP BFP.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>

Support both 24-bit and 32-bit address values when constructing the
device command.  Note that some commands require 24-bit address
regardless of mode, and some require 32-bit addresses regardless of
mode, so provide command-specific overrides of a generic (but not yet
configurable) default address size.

With this we no longer need a special interface for READ_SFDP which
uses a 24-bit address but with a wait state introduced by clocking out
a fifth command byte.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>

This driver abstracts most access through a generic function that
supports both read and write with and without address components in
the command.  Rework this so that instead of distinct arguments
specifying the combination of features there's a flag set that will
allow more combinations to be specified.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>

The LiteX UART IRQ support / UART peripheral still exhibits
issues when IRQs are enabled.  These issues appear most
severe when deferred logging is enabled.

Temporarily disable IRQ support to restore functionality.

Benchmarking was completely overhauled in an older Zephyr
version, so the functionality references no longer needs
to be implemented.

Remove QEMU-specific hack.  QEMU should be fixed,
not worked around in system firmware.

Stop z_arch_get_next_switch_handle() stepping on SRR1 save region
Move interrupt stacks to dedicated stack regions
General cleanup

This avoids bloating the binary program area with
unnecessary zero data, and allows the use of a large
heap allocation limit at reasonable program sizes.

Tested to work on Kestrel