Why does the PE-HMI1 S7G2.ld file specify a 64M QSPI ?

/* Linker script to configure memory regions. */
MEMORY
{
FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x0400000 /* 4M */
RAM (rwx) : ORIGIN = 0x1FFE0000, LENGTH = 0x00A0000 /* 640K */
DATA_FLASH (rx) : ORIGIN = 0x40100000, LENGTH = 0x0010000 /* 64K */
QSPI_FLASH (rx) : ORIGIN = 0x60000000, LENGTH = 0x4000000 /* 64M, Change in QSPI section below also */
SDRAM (rwx) : ORIGIN = 0x90000000, LENGTH = 0x2000000 /* 32M */
}