Refactor kernel build commands to remove unnecessary output directory specification

Author: andrewmcwatters

.github/workflows/makefile.yml

@@ -44,9 +44,9 @@ jobs:
       if: steps.cache-kernel.outputs.cache-hit != 'true'
       run: |
         cd ${{ env.VERSION }}
-        make O=${{ github.workspace }}/iso/boot defconfig
-        make O=${{ github.workspace }}/iso/boot
-        sudo make O=${{ github.workspace }}/iso/boot modules_install install
+        make defconfig
+        make
+        sudo make INSTALL_MOD_PATH=${{ github.workspace }}/iso/boot INSTALL_PATH=${{ github.workspace }}/iso/boot modules_install install
 
     # https://docs.kernel.org/filesystems/ramfs-rootfs-initramfs.html
     # https://docs.kernel.org/filesystems/ramfs-rootfs-initramfs.html#contents-of-initramfs