hrcon: Migrate to CONFIG_TARGET_HRCON

Use the proper CONFIG_TARGET_HRCON Kconfig option to replace
the CONFIG_HRCON ad-hoc config option.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/board/gdsys/common/Makefile b/board/gdsys/common/Makefile
index af9058a..67d2b31 100644
--- a/board/gdsys/common/Makefile
+++ b/board/gdsys/common/Makefile
@@ -10,7 +10,7 @@
 obj-$(CONFIG_IOCON) += osd.o mclink.o dp501.o phy.o ch7301.o
 obj-$(CONFIG_DLVISION_10G) += osd.o dp501.o
 obj-$(CONFIG_CONTROLCENTERD) += dp501.o
-obj-$(CONFIG_HRCON) += osd.o mclink.o dp501.o phy.o ioep-fpga.o fanctrl.o
+obj-$(CONFIG_TARGET_HRCON) += osd.o mclink.o dp501.o phy.o ioep-fpga.o fanctrl.o
 obj-$(CONFIG_STRIDER) += mclink.o dp501.o phy.o ioep-fpga.o adv7611.o ch7301.o
 obj-$(CONFIG_STRIDER) += fanctrl.o
 obj-$(CONFIG_STRIDER_CON) += osd.o
diff --git a/board/gdsys/mpc8308/Makefile b/board/gdsys/mpc8308/Makefile
index 60d2232..f29376f 100644
--- a/board/gdsys/mpc8308/Makefile
+++ b/board/gdsys/mpc8308/Makefile
@@ -4,5 +4,5 @@
 # Dirk Eibach,  Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc
 
 obj-y := mpc8308.o sdram.o
-obj-$(CONFIG_HRCON) += hrcon.o
+obj-$(CONFIG_TARGET_HRCON) += hrcon.o
 obj-$(CONFIG_STRIDER) += strider.o