x86/msr: Remove a superfluous inclusion of <asm/asm.h>

The following commit:

  efef7f18 ("x86/msr: Add explicit includes of <asm/msr.h>")

added a superfluous inclusion of <asm/asm.h> to

  drivers/acpi/processor_throttling.c.

Remove it.

Fixes: efef7f18 ("x86/msr: Add explicit includes of <asm/msr.h>")
Signed-off-by: Xin Li (Intel) <xin@zytor.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Link: https://lore.kernel.org/r/20250512084552.1586883-2-xin@zytor.com