mb/ocp/deltalake: Fill ECC type in romstage

Fill the ECC type in `struct memory_info` in romstage, and in SoC code.
The SMBIOS override is unnecessary, and this is not mainboard-specific.

Change-Id: I8370b3ee7d75914b895946b53923598adf87b522
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50179
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Johnny Lin <Johnny_Lin@wiwynn.com>
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Jonathan Zhang <jonzhang@fb.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/include/smbios.h

@@ -61,7 +61,6 @@ void smbios_type0_bios_version(uintptr_t address);
 
 void smbios_ec_revision(uint8_t *ec_major_revision, uint8_t *ec_minor_revision);
 
-unsigned int smbios_memory_error_correction_type(struct memory_info *meminfo);
 unsigned int smbios_processor_external_clock(void);
 unsigned int smbios_processor_characteristics(void);
 struct cpuid_result;