Revert "configs: JH7110: enable EFI_LOADER_BOUNCE_BUFFER"

("Enable EFI_LOADER_BOUNCE_BUFFER") is not the correct fix for the
problem it describes.

The change of memory addressing leading to side-effects in commit
22f2c9ed ("efi: memory: use the lmb API's for allocating and
freeing memory") is remedied by commit 1a48b0be ("lmb: prohibit
allocations above ram_top even from same bank").

This reverts commit 9c792ab3.

configs/starfive_visionfive2_defconfig

@@ -32,7 +32,6 @@ CONFIG_CMODEL_MEDANY=y
 CONFIG_RISCV_SMODE=y
 # CONFIG_OF_BOARD_FIXUP is not set
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
-CONFIG_EFI_LOADER_BOUNCE_BUFFER=y
 CONFIG_FIT=y
 CONFIG_BOOTSTD_DEFAULTS=y
 CONFIG_BOOTSTAGE=y