Add support for flash controller with XIP on i.MX RT series

[pdgendt]

This change allows writing to the flash while running in XIP mode, and enables mcuboot or NVS settings to be used on i.MX RT socs with a single flash chip.
The bootloader application itself should contain the IVT/DCD in the header, but the chainable application doesn't.
The ROM_START_OFFSET defaults to 0x400 otherwise the linker alignment isn't taken into account.

It is required when running with XIP to enable code relocation, because accessing the flash needs to run in RAM.

Tested on i.MX RT1064 internal flash

[MaureenHelm]

Thank you for the contribution!

[github-actions]

The following west manifest projects have been modified in this Pull Request:

Name	Old Revision	New Revision	Diff
hal_nxp	zephyrproject-rtos/hal_nxp@4560b0a	zephyrproject-rtos/hal_nxp@27a464e (master)	zephyrproject-rtos/[email protected]

Note: This message is automatically posted and updated by the Manifest GitHub Action.

[MaureenHelm]

With some hacky changes to move the storage partition, I was able to confirm that samples/subsys/fs/littlefs can now work on the mimxrt1064_evk internal flash:

diff --git a/boards/arm/mimxrt1064_evk/mimxrt1064_evk.dts b/boards/arm/mimxrt1064_evk/mimxrt1064_evk.dts
index 13e0399c7d..03c86766c9 100644
--- a/boards/arm/mimxrt1064_evk/mimxrt1064_evk.dts
+++ b/boards/arm/mimxrt1064_evk/mimxrt1064_evk.dts
@@ -152,14 +152,30 @@ arduino_i2c: &lpi2c1 {};
                        #address-cells = <1>;
                        #size-cells = <1>;
 
-                       storage_partition: partition@0 {
-                               label = "storage";
+                       partition@0 {
                                reg = <0x00000000 DT_SIZE_M(8)>;
                        };
                };
        };
 };
 
+&flexspi2 {
+       status = "okay";
+};
+
+&w25q32jvwj0 {
+       partitions {
+               compatible = "fixed-partitions";
+               #address-cells = <1>;
+               #size-cells = <1>;
+
+               storage_partition: partition@14000 {
+                       label = "storage";
+                       reg = <0x00014000 DT_SIZE_K(32)>;
+               };
+       };
+};
+
 &lpuart1 {
        status = "okay";
        current-speed = <115200>;

[MaureenHelm]

Please rebase