tree: Remove duplicated <stdint.h>

<types.h> is supposed to provide <stdint.h>.

Change-Id: Ia68a0dc8fba4a48401e213ebb8356e32f0a019ab
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81633
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/cpu/x86/smm/smm_module_loader.c

@@ -10,7 +10,6 @@
 #include <device/device.h>
 #include <device/mmio.h>
 #include <rmodule.h>
-#include <stdint.h>
 #include <stdio.h>
 #include <string.h>
 #include <types.h>

src/soc/sifive/fu740/include/soc/sdram.h

@@ -3,7 +3,6 @@
 #ifndef SIFIVE_COMMON_SDRAM_H
 #define SIFIVE_COMMON_SDRAM_H
 
-#include <stdint.h>
 #include <types.h>
 
 void sdram_init(size_t dram_size);