tests: drivers: eeprom: move API tests to subdirectory

Move the EEPROM API tests to a subdirectory to prepare for further EEPROM
driver tests.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>

tests/drivers/eeprom/api/testcase.yaml

@@ -0,0 +1,12 @@
+common:
+  depends_on: eeprom
+  tags: drivers eeprom
+tests:
+  drivers.eeprom.api:
+    # Tests overwrite EEPROM content, only run on select boards
+    platform_allow: |
+      native_posix native_posix_64 qemu_x86
+      nucleo_l152re nucleo_l073rz
+  drivers.eeprom.api.build:
+    # Build-only test for boards with EEPROMs
+    build_only: true

tests/drivers/eeprom/testcase.yaml

@@ -1,10 +0,0 @@
-tests:
-  peripheral.eeprom:
-    platform_allow: |
-      native_posix native_posix_64 qemu_x86
-      nucleo_l152re nucleo_l073rz
-    tags: drivers userspace
-  peripheral.eeprom.generic:
-    build_only: true
-    depends_on: eeprom
-    tags: drivers userspace