soc: nxp: lpc55XXX: add cache support for LPC55S36

Enable instruction cache support for LPC55S36 SoC:
- Select CPU_HAS_ICACHE and HAS_MCUX_SYSCON_LPCAC
- Enable CACHE_MANAGEMENT and EXTERNAL_CACHE by default
- Set ICACHE_LINE_SIZE to 256 bytes

This enables the SYSCON LPCAC cache driver for improved
performance on the LPC55S36 SoC.

Signed-off-by: Holt Sun <[email protected]>

Author: Holt-Sun

soc/nxp/lpc/lpc55xxx/Kconfig

@@ -1,4 +1,4 @@
-# Copyright 2019,2024 NXP
+# Copyright 2019, 2024-2025 NXP
 # SPDX-License-Identifier: Apache-2.0
 
 config SOC_SERIES_LPC55XXX
@@ -45,6 +45,8 @@ config SOC_LPC55S36
 	select CPU_HAS_FPU
 	select ARMV8_M_DSP
 	select ARM_TRUSTZONE_M
+	select CPU_HAS_ICACHE
+	select HAS_MCUX_SYSCON_LPCAC
 
 config SOC_LPC55S69
 	select CPU_CORTEX_M33

soc/nxp/lpc/lpc55xxx/Kconfig.defconfig

@@ -1,4 +1,4 @@
-# Copyright 2019,2024 NXP
+# Copyright 2019, 2024-2025 NXP
 # SPDX-License-Identifier: Apache-2.0
 
 if SOC_SERIES_LPC55XXX
@@ -53,6 +53,21 @@ config CAN_MCUX_MCAN
 
 endif # SOC_LPC55S16
 
+if SOC_LPC55S36
+
+# Enable cache management features
+config CACHE_MANAGEMENT
+	default y
+
+choice CACHE_TYPE
+	default EXTERNAL_CACHE
+endchoice
+
+config ICACHE_LINE_SIZE
+	default 256
+
+endif # SOC_LPC55S36
+
 if SOC_LPC55S69_CPU0
 
 config SOC_FLASH_MCUX