fix(esp_system): fix binary generation error when no eh_frame but TLS

ERROR:
A fatal error occurred: Segment loaded at 0x3c01d150 lands in same 64KB flash
mapping as segment loaded at 0x3c018020. Can't generate binary. Suggest
changing linker script or ELF to merge sections.

Seems binary generator does not handle well empty sections that contains
aligning only. I did not investigate much but this change helped.

components/esp_system/ld/esp32c2/sections.ld.in

@@ -227,19 +227,18 @@ SECTIONS
     _esp_system_init_fn_array_end = ABSOLUTE(.);
 
     _rodata_end = ABSOLUTE(.);
-    . = ALIGN(ALIGNOF(.eh_frame_hdr));
+    . = ALIGN(ALIGNOF(SECTION_AFTER_FLASH_RODATA));
   } > default_rodata_seg
-  ASSERT_SECTIONS_GAP(.flash.rodata, .eh_frame_hdr)
+  ASSERT_SECTIONS_GAP(.flash.rodata, SECTION_AFTER_FLASH_RODATA)
 
+#if EH_FRAME_LINKING_ENABLED
   .eh_frame_hdr :
   {
-#if CONFIG_COMPILER_CXX_EXCEPTIONS || CONFIG_ESP_SYSTEM_USE_EH_FRAME
     ALIGNED_SYMBOL(4, __eh_frame_hdr)
 
     KEEP (*(.eh_frame_hdr))
 
     __eh_frame_hdr_end = ABSOLUTE(.);
-#endif // CONFIG_COMPILER_CXX_EXCEPTIONS || CONFIG_ESP_SYSTEM_USE_EH_FRAME
 
     . = ALIGN(ALIGNOF(.eh_frame));
   } > default_rodata_seg
@@ -247,7 +246,6 @@ SECTIONS
 
   .eh_frame :
   {
-#if CONFIG_COMPILER_CXX_EXCEPTIONS || CONFIG_ESP_SYSTEM_USE_EH_FRAME
     ALIGNED_SYMBOL(4, __eh_frame)
 
     KEEP (*(.eh_frame))
@@ -258,11 +256,11 @@ SECTIONS
     LONG(0);
 
     __eh_frame_end = ABSOLUTE(.);
-#endif // CONFIG_COMPILER_CXX_EXCEPTIONS || CONFIG_ESP_SYSTEM_USE_EH_FRAME
 
     . = ALIGN(ALIGNOF(.flash.tdata));
   } > default_rodata_seg
   ASSERT_SECTIONS_GAP(.eh_frame, .flash.tdata)
+#endif // EH_FRAME_LINKING_ENABLED
 
   .flash.tdata :
   {