depot: merge rtc_drv into system_clock runtime pkg

This new version of the system_clock pkg does no longer depend on the
presence of an external 'Rtc' service as previously provided by the
Sculpt base system. Instead, it hosts the rtc_drv inside the subsystem.
Because rtc_drv is board-dependent, the system_clock pkg is named
system_clock-pc now.

Issue #4281

repos/libports/recipes/pkg/system_clock-pc/archives

@@ -0,0 +1,3 @@
+_/src/system_rtc
+_/src/rtc_drv
+_/src/init

repos/libports/recipes/pkg/system_clock-pc/runtime

@@ -0,0 +1,54 @@
+<runtime ram="4M" caps="300" binary="init">
+
+	<provides> <rtc/> </provides>
+
+	<requires> <timer/> <irq/> <io_port/> </requires>
+
+	<content>
+		<rom label="ld.lib.so"/>
+		<rom label="init"/>
+		<rom label="rtc_drv"/>
+		<rom label="system_rtc"/>
+	</content>
+
+	<config>
+
+		<parent-provides>
+			<service name="ROM"/>
+			<service name="IRQ"/>
+			<service name="IO_MEM"/>
+			<service name="IO_PORT"/>
+			<service name="PD"/>
+			<service name="RM"/>
+			<service name="CPU"/>
+			<service name="LOG"/>
+			<service name="Timer"/>
+		</parent-provides>
+
+		<default caps="100"/>
+
+		<service name="Rtc">
+			<default-policy> <child name="system_rtc"/> </default-policy> </service>
+
+		<start name="rtc_drv">
+			<resource name="RAM" quantum="1M"/>
+			<provides> <service name="Rtc"/> </provides>
+			<config/>
+			<route>
+				<any-service> <parent/> </any-service>
+			</route>
+		</start>
+
+		<start name="system_rtc">
+			<resource name="RAM" quantum="1M"/>
+			<provides> <service name="Rtc"/> </provides>
+			<config/>
+			<route>
+				<service name="Rtc"> <child name="rtc_drv"/> </service>
+				<any-service> <parent/> </any-service>
+			</route>
+		</start>
+
+	</config>
+
+</runtime>

repos/libports/recipes/pkg/system_clock/archives

@@ -1 +0,0 @@
-_/src/system_rtc

repos/libports/recipes/pkg/system_clock/runtime

@@ -1,19 +0,0 @@
-<runtime ram="3M" caps="100" binary="system_rtc">
-
-	<provides>
-		<rtc/>
-	</provides>
-
-	<requires>
-		<rtc/>
-		<timer/>
-	</requires>
-
-	<content>
-		<rom label="ld.lib.so"/>
-		<rom label="system_rtc"/>
-	</content>
-
-	<config allow_setting_rtc="false"/>
-
-</runtime>