arch/x86/acpi: Remove obsolete acpi_gen_regaddr resv field

Since ACPI v2.c, this field is access_size.
Currently, coreboot is using ACPI v3,so we can drop '.resv' field.

Change-Id: I7b3b930861669bb05cdc8e81f6502476a0568fe0
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/31701
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/cpu/intel/common/common_init.c

@@ -113,9 +113,7 @@ void cpu_init_cppc_config(struct cppc_config *config, u32 version)
 		.space_id   = ACPI_ADDRESS_SPACE_FIXED,
 		.bit_width  = 8,
 		.bit_offset = 0,
-		{
-			.access_size = 4
-		},
+		.access_size = 4,
 		.addrl      = 0,
 		.addrh      = 0,
 	};
@@ -123,9 +121,7 @@ void cpu_init_cppc_config(struct cppc_config *config, u32 version)
 		.space_id   = ACPI_ADDRESS_SPACE_MEMORY,
 		.bit_width  = 0,
 		.bit_offset = 0,
-		{
-			.resv = 0
-		},
+		.access_size = 0,
 		.addrl      = 0,
 		.addrh      = 0,
 	};