mtd: spi-nor: fsl-quadspi: fix api naming typo _init_ahb_read

Fix api naming typo _init_ahb_read
fsl_qspi_init_abh_read --> fsl_qspi_init_ahb_read

Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
Acked-by: Han Xu <han.xu@nxp.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>