linux-kexecboot: move logos in recipes/linux/files

* custom-sized distro logos can be shared including linux.inc
* and e.g. adding SRC_URI += "file://${LOGO_SIZE}/logo_linux_clut224.ppm.bz2"
* to the recipe.

diff --git a/recipes/linux/linux-kexecboot/angstrom/qvga/logo_linux_clut224.ppm.bz2 b/recipes/linux/files/angstrom/qvga/logo_linux_clut224.ppm.bz2
similarity index 100%
rename from recipes/linux/linux-kexecboot/angstrom/qvga/logo_linux_clut224.ppm.bz2
rename to recipes/linux/files/angstrom/qvga/logo_linux_clut224.ppm.bz2

diff --git a/recipes/linux/linux-kexecboot/angstrom/vga/logo_linux_clut224.ppm.bz2 b/recipes/linux/files/angstrom/vga/logo_linux_clut224.ppm.bz2
similarity index 100%
rename from recipes/linux/linux-kexecboot/angstrom/vga/logo_linux_clut224.ppm.bz2
rename to recipes/linux/files/angstrom/vga/logo_linux_clut224.ppm.bz2

diff --git a/recipes/linux/linux-kexecboot/qvga/logo_linux_clut224.ppm.bz2 b/recipes/linux/files/qvga/logo_linux_clut224.ppm.bz2
similarity index 100%
rename from recipes/linux/linux-kexecboot/qvga/logo_linux_clut224.ppm.bz2
rename to recipes/linux/files/qvga/logo_linux_clut224.ppm.bz2

diff --git a/recipes/linux/linux-kexecboot/vga/logo_linux_clut224.ppm.bz2 b/recipes/linux/files/vga/logo_linux_clut224.ppm.bz2
similarity index 100%
rename from recipes/linux/linux-kexecboot/vga/logo_linux_clut224.ppm.bz2
rename to recipes/linux/files/vga/logo_linux_clut224.ppm.bz2