[BUG] The sram.ld file for the NXP mr-canhubk3 board is missing.

### Description / Steps to reproduce the issue

NXP mr-canhubk3 board -> sram.ld file missing

```
ifeq ($(CONFIG_BOOT_RUNFROMFLASH),y)
LDSCRIPT = flash.ld
else ifeq ($(CONFIG_BOOT_RUNFROMISRAM),y)
LDSCRIPT = sram.ld
endif
```

https://github.com/apache/nuttx/blob/64d191d32e3008866f4fd06b22db4a53b163098d/boards/arm/s32k3xx/mr-canhubk3/scripts/Make.defs#L32

### On which OS does this issue occur?

[OS: BSD], [OS: Linux], [OS: Mac], [OS: Windows]

### What is the version of your OS?

GitHub Actions

### NuttX Version

master and all old versions

### Issue Architecture

[Arch: arm]

### Issue Area

[Area: Build System]

### Host information

_No response_

### Verification

- [x] I have verified before submitting the report.