kernel_loader: temporary fix for building on arm
kernel_loader: temporary fix for building on arm

Removed the architecture configuration for the load_kernel
function. This is a temporary fix to make Firecracker build on
aarch64.

Signed-off-by: Andreea Florescu <f68a7d732e796861f8e79ea704b43a5ee52eddaf@amazon.com>

firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker