Move ODROID patches (#1415)

The patches for ODROID-C2/C4 don't apply to Linux 5.12 used in
ODROID-N2. Move ODROID-C2/C4 patches to kernel version specific
directory so they don't get applied for ODROID-N2.

buildroot-external/board/hardkernel/patches/linux/general-meson64-i2cX-missing-pins.patch

@@ -1,22 +0,0 @@
-diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
-index 98cbba6..48ca119 100644
---- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
-+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
-@@ -321,6 +322,8 @@
- 
- &i2c_A {
- 	clocks = <&clkc CLKID_I2C>;
-+	pinctrl-names = "default";
-+	pinctrl-0 = <&i2c_a_pins>;
- };
- 
- &i2c_AO {
-@@ -329,6 +332,8 @@
- 
- &i2c_B {
- 	clocks = <&clkc CLKID_I2C>;
-+	pinctrl-names = "default";
-+	pinctrl-0 = <&i2c_b_pins>;
- };
- 
- &i2c_C {