include/cpu/amd/mtrr: fix typo in get_top_of_mem_above_4gb

Add the missing 'b' to the 4gb so that get_top_of_mem_above_4gb is in
line with get_top_of_mem_below_4gb.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ic9170372d8b0c27d7de3bd04d822c95e2015cb10
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74710
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>

src/include/cpu/amd/mtrr.h

@@ -70,7 +70,7 @@ static inline uint32_t get_top_of_mem_below_4gb(void)
 	return rdmsr(TOP_MEM).lo;
 }
 
-static inline uint64_t get_top_of_mem_above_4g(void)
+static inline uint64_t get_top_of_mem_above_4gb(void)
 {
 	msr_t msr = rdmsr(TOP_MEM2);
 	return (uint64_t)msr.hi << 32 | msr.lo;

src/northbridge/amd/pi/00730F01/northbridge.c

@@ -550,7 +550,7 @@ static void northbridge_fill_ssdt_generator(const struct device *device)
 	 * Shift value right by 20 bit to make it fit into 32bit,
 	 * giving us 1MB granularity and a limit of almost 4Exabyte of memory.
 	 */
-	acpigen_write_name_dword("TOM2", get_top_of_mem_above_4g() >> 20);
+	acpigen_write_name_dword("TOM2", get_top_of_mem_above_4gb() >> 20);
 	acpigen_pop_len();
 }
 
@@ -834,7 +834,7 @@ static void domain_read_resources(struct device *dev)
 				sizek = 0;
 			}
 			else {
-				uint64_t topmem2 = get_top_of_mem_above_4g();
+				uint64_t topmem2 = get_top_of_mem_above_4gb();
 				basek = 4 * 1024 * 1024;
 				sizek = topmem2 / 1024 - basek;
 			}

src/soc/amd/common/block/acpi/tables.c

@@ -58,6 +58,6 @@ void acpi_fill_root_complex_tom(const struct device *device)
 	 * Shift value right by 20 bit to make it fit into 32bit,
 	 * giving us 1MB granularity and a limit of almost 4Exabyte of memory.
 	 */
-	acpigen_write_name_dword("TOM2", get_top_of_mem_above_4g() >> 20);
+	acpigen_write_name_dword("TOM2", get_top_of_mem_above_4gb() >> 20);
 	acpigen_pop_len();
 }

src/soc/amd/stoneyridge/northbridge.c

@@ -328,7 +328,7 @@ void domain_read_resources(struct device *dev)
 	uint32_t uma_size = get_uma_size();
 	uint32_t mem_useable = (uintptr_t)cbmem_top();
 	uint32_t tom = get_top_of_mem_below_4gb();
-	uint64_t high_tom = get_top_of_mem_above_4g();
+	uint64_t high_tom = get_top_of_mem_above_4gb();
 	uint64_t high_mem_useable;
 	int idx = 0x10;