soc: esp32c6: Fix sleep routine

PMU related functions need to be located in IRAM when sleep
process is triggered, as cache is disabled past a certain point
in the execution of the sleep process.

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

Author: Raffael Rostagno

soc/espressif/esp32c6/default.ld

@@ -405,6 +405,7 @@ SECTIONS
     *libzephyr.a:esp_memory_utils.*(.literal .literal.* .text .text.*)
     *libzephyr.a:pmu_init.*(.literal .literal.* .text .text.*)
     *libzephyr.a:pmu_param.*(.literal .literal.* .text .text.*)
+    *libzephyr.a:pmu_sleep.*(.literal .literal.* .text .text.*)
     *libzephyr.a:rtc_clk.*(.literal .literal.* .text .text.*)
     *libzephyr.a:rtc_clk_init.*(.literal .literal.* .text .text.*)
     *libzephyr.a:rtc_time.*(.literal .literal.* .text .text.*)