cpu/avr8_common: Fix PM and Common peripherals build

Co-authored-by: Marian Buschsieweke <marian.buschsieweke@posteo.net>
Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>

cpu/avr8_common/Kconfig

@@ -12,6 +12,8 @@ config CPU_ARCH_AVR8
     select HAS_ARCH_AVR8
     select HAS_PERIPH_PM
 
+    select MODULE_AVR8_COMMON_PERIPH if TEST_KCONFIG
+    select MODULE_PM_LAYERED if TEST_KCONFIG
     select MODULE_MALLOC_THREAD_SAFE if TEST_KCONFIG
     select MODULE_TINY_STRERROR_AS_STRERROR if TEST_KCONFIG
     # static C++ constructors need guards for thread safe initialization
@@ -41,6 +43,13 @@ config MODULE_AVR8_COMMON
     help
         AVR-8 common code.
 
+    config MODULE_AVR8_COMMON_PERIPH
+    bool
+    depends on TEST_KCONFIG
+    default y
+    help
+        Common peripheral drivers used across different AVR-8 MCU families.
+
 # the atmel port uses stdio_uart by default
 choice STDIO_IMPLEMENTATION
     default MODULE_STDIO_UART