platform/x86: amd: Use *-y instead of *-objs in Makefiles

platform/x86: amd: Use *-y instead of *-objs in Makefiles

The `objs` suffix is reserved for user-space tools. Use the `y` suffix
instead, which is usually used for kernel drivers.

While at it, fix alignment in AMD PMC and PMF Makefiles.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Kurt Borja <kuurtb@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20250218194113.26589-3-kuurtb@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>