soc: esp32h2: Fix LP SRAM size

Fix LP SRAM size on memory map. Correct value is obtained from
device tree.

Signed-off-by: Raffael Rostagno <[email protected]>

Author: Raffael Rostagno

soc/espressif/esp32h2/default.ld

@@ -68,7 +68,7 @@ MEMORY
   drom0_0_seg(R):  org = DROM_SEG_ORG, len = DROM_SEG_LEN
 
   lp_ram_seg(RW):    org = LPSRAM_IRAM_START,
-                     len = 0x4000 - CONFIG_RESERVE_RTC_MEM
+                     len = LPSRAM_SIZE - CONFIG_RESERVE_RTC_MEM
 
   /* We reduced the size of lp_ram_seg by CONFIG_RESERVE_RTC_MEM value.
      It reserves the amount of LP memory that we use for this memory segment.
@@ -78,7 +78,7 @@ MEMORY
      The aim of this is to keep data that will not be moved around and have a fixed address.
   */
 #if (CONFIG_RESERVE_RTC_MEM > 0)
-  lp_reserved_seg(RW) :  org = LPSRAM_IRAM_START + 0x4000 - CONFIG_RESERVE_RTC_MEM,
+  lp_reserved_seg(RW) :  org = LPSRAM_IRAM_START + LPSRAM_SIZE - CONFIG_RESERVE_RTC_MEM,
                          len = CONFIG_RESERVE_RTC_MEM
 #endif