mtd: tests: mtd_readtest: Replace printk with pr_{info,err}
mtd: tests: mtd_readtest: Replace printk with pr_{info,err}

Use pr_fmt instead of PRINT_PREF macro

Signed-off-by: Vikram Narayanan <6fb9d67c30a5971c642c9e795c13bd70b1391f75@gmail.com>
Signed-off-by: Artem Bityutskiy <2f96f8cd3e2780a209d0ab27d1b44624d0019d3f@linux.intel.com>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas