[SCSI] advansys: use request_firmware

Firmware blob looks like this...
        __le32 checksum
        unsigned char data[]
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

WHENCE

@@ -45,6 +45,19 @@ Found alsa-firmware package in hex form, with the following comment:
 
 --------------------------------------------------------------------------
 
+Driver: SCSI_ADVANSYS - AdvanSys SCSI
+
+File: advansys/mcode.bin
+File: advansys/3550.bin
+File: advansys/38C0800.bin
+File: advansys/38C1600.bin
+
+Licence: BSD, no source available.
+
+Found in hex form in kernel source.
+
+--------------------------------------------------------------------------
+
 Driver: SCSI_QLOGIC_1280 - Qlogic QLA 1240/1x80/1x160 SCSI support
 
 File: qlogic/1040.bin