stm32mp1: cosmetic: remove comment

Remove unnecessary comment.
Signed-off-by: NPatrick Delaunay <patrick.delaunay@st.com>

include/configs/stm32mp1.h

@@ -52,7 +52,6 @@
 
 /* SPL support */
 #ifdef CONFIG_SPL
-/* BOOTROM load address */
 /* SPL use DDR */
 #define CONFIG_SPL_BSS_START_ADDR	0xC0200000
 #define CONFIG_SPL_BSS_MAX_SIZE		0x00100000