include/arch/acpigen: Fix typo

Change-Id: I277d4a36f3d76ff5e12f255165e2b08480c39167
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38307
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/arch/x86/include/arch/acpigen.h

@@ -389,7 +389,7 @@ void acpigen_write_dsm(const char *uuid, void (**callbacks)(void *),
 void acpigen_write_dsm_uuid_arr(struct dsm_uuid *ids, size_t count);
 
 /*
- * Generate ACPI AML code for _CPC (Continuous Perfmance Control).
+ * Generate ACPI AML code for _CPC (Continuous Performance Control).
  * Execute the package function once to create a global table, then
  * execute the method function within each processor object to
  * create a method that points to the global table.