board/licheepi_zero: move board files to their own directory

Group files for board licheepi_zero under the existing manufacturer
directory, like all the other boards by Sipeed.

Signed-off-by: Francois Dugast <francois.dugast.foss@gmail.com>
[yann.morin.1998@free.fr: use the manufacturer sub-dir]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

board/sipeed/licheepi_zero/readme.txt

@@ -10,7 +10,7 @@ How to build it
 Configure Buildroot
 -------------------
 
-  $ make licheepi_zero_defconfig
+  $ make sipeed_licheepi_zero_defconfig
 
 Build the rootfs
 ----------------

configs/licheepi_zero_defconfig

@@ -12,7 +12,7 @@ BR2_TARGET_GENERIC_ISSUE="Welcome to Buildroot for the LicheePi Zero"
 BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"
 BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200=y
 BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
-BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/licheepi/genimage.cfg"
+BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/sipeed/licheepi_zero/genimage.cfg"
 
 # Kernel
 BR2_LINUX_KERNEL=y
@@ -45,7 +45,7 @@ BR2_TARGET_UBOOT_FORMAT_CUSTOM=y
 BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot-sunxi-with-spl.bin"
 BR2_PACKAGE_HOST_UBOOT_TOOLS=y
 BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT=y
-BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT_SOURCE="board/licheepi/boot.cmd"
+BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT_SOURCE="board/sipeed/licheepi_zero/boot.cmd"
 
 # Required host utilities for building an SDCard image
 BR2_PACKAGE_HOST_DOSFSTOOLS=y