AGESA: skip s3_resume.h if CONFIG_HAVE_ACPI_RESUME is disabled

Commit »AMD S3: Introduce Kconfig variable 'S3_DATA_SIZE'« (22ec9f9a) [1]
introduced a check throwing an error if S3_DATA_SIZE isn't big enough.

However without CONFIG_HAVE_ACPI_RESUME the variable S3_DATA_SIZE
isn't defined at all and compilation will fail if s3_resume.h is
included.

This patch makes it again possible turn off HAVE_ACPI_RESUME relatively
easily in Parmer/Thatcher/Persimmon's Kconfig if you don't care about S3
and don't want flash writes on every boot.

[1] http://review.coreboot.org/2383

Change-Id: I999e4b7634bf172d8380fd14cba6f7f03468fee3
Signed-off-by: Jens Rottmann <JRottmann@LiPPERTembedded.de>
Reviewed-by: Dave Frodin <dave.frodin@se-eng.com>
Reviewed-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: http://review.coreboot.org/2528
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)

src/cpu/amd/agesa/s3_resume.h

@@ -20,6 +20,8 @@
 #ifndef S3_RESUME_H
 #define S3_RESUME_H
 
+#if CONFIG_HAVE_ACPI_RESUME
+
 /* The size needs to be 4k aligned, which is the sector size of most flashes. */
 #define S3_DATA_VOLATILE_SIZE	0x6000
 #define S3_DATA_MTRR_SIZE	0x1000
@@ -48,3 +50,5 @@ void OemAgesaGetS3Info (S3_DATA_TYPE S3DataType, u32 *DataSize, void **Data);
 void OemAgesaSaveMtrr (void);
 
 #endif
+
+#endif