bsp: nxp/mcx/mcxc: FRDM-MCXC444: Fix GCC build suport.

This patch fixes GCC build support for FRDM-MCXC444.

* Updated compiler flags to Cortex-M0 without FPU.
* Updated linker script to add RT-Thread const tables.

bsp/nxp/mcx/mcxc/frdm-mcxc444/board/linker_scripts/MCXC444_flash.ld

@@ -70,6 +70,27 @@ SECTIONS
     . = ALIGN(4);
   } > m_text
 
+  .rtt_const_tables :
+  {
+     /* section information for finsh shell */
+     . = ALIGN(4);
+     __fsymtab_start = .;
+     KEEP(*(FSymTab))
+     __fsymtab_end = .;
+
+     . = ALIGN(4);
+     __vsymtab_start = .;
+     KEEP(*(VSymTab))
+     __vsymtab_end = .;
+
+    /* section information for initial. */
+    . = ALIGN(4);
+    __rt_init_start = .;
+    KEEP(*(SORT(.rti_fn*)))
+    __rt_init_end = .;
+
+  } > m_text
+
   .ARM.extab :
   {
     *(.ARM.extab* .gnu.linkonce.armextab.*)

bsp/nxp/mcx/mcxc/frdm-mcxc444/rtconfig.py

@@ -44,10 +44,10 @@
     OBJCPY = PREFIX + 'objcopy'
     STRIP = PREFIX + 'strip'
 
-    DEVICE = ' -mcpu=' + CPU + ' -mthumb -mfpu=fpv5-sp-d16 -mfloat-abi=hard -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -Wall -D__FPU_PRESENT'
+    DEVICE = ' -mcpu=' + CPU + ' -mthumb -ffunction-sections -fdata-sections'
+    CFLAGS = DEVICE + ' -Wall'
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -D__START=entry -D__STARTUP_CLEAR_BSS'
-    LFLAGS = DEVICE + ' -specs=nano.specs -specs=nosys.specs -Wl,--defsym=__heap_size__=0x10000,--gc-sections,-Map=rtthread.map,--print-memory-usage -Tboard/linker_scripts/MCXC444_flash.ld'
+    LFLAGS = DEVICE + ' -specs=nano.specs -specs=nosys.specs -Wl,--defsym=__heap_size__=0x4000,--gc-sections,-Map=rtthread.map,--print-memory-usage -Tboard/linker_scripts/MCXC444_flash.ld'
 
     CPATH = ''
     LPATH = ''